Paleoclimate significance of n-alkane molecular distributions and δ2H values in surface peats across the monsoon region of China
Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon r...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Huang, Xianyu [verfasserIn] |
|---|
| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2016transfer abstract |
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| Umfang: |
10 |
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| Übergeordnetes Werk: |
Enthalten in: The head constituent plays a key role in the lexical boost in syntactic priming - Huang, Jian ELSEVIER, 2023, Amsterdam [u.a.] |
|---|---|
| Übergeordnetes Werk: |
volume:461 ; year:2016 ; day:1 ; month:11 ; pages:77-86 ; extent:10 |
| Links: |
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| DOI / URN: |
10.1016/j.palaeo.2016.08.011 |
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| 520 | |a Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. | ||
| 520 | |a Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. | ||
| 700 | 1 | |a Meyers, Philip A. |4 oth | |
| 700 | 1 | |a Xue, Jiantao |4 oth | |
| 700 | 1 | |a Zhang, Yiming |4 oth | |
| 700 | 1 | |a Wang, Xinxin |4 oth | |
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10.1016/j.palaeo.2016.08.011 doi GBVA2016023000026.pica (DE-627)ELV030155126 (ELSEVIER)S0031-0182(16)30329-7 DE-627 ger DE-627 rakwb eng 550 930 550 DE-600 930 DE-600 400 370 150 VZ 5,3 ssgn LING DE-30 fid 17.00 bkl Huang, Xianyu verfasserin aut Paleoclimate significance of n-alkane molecular distributions and δ2H values in surface peats across the monsoon region of China 2016transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. Meyers, Philip A. oth Xue, Jiantao oth Zhang, Yiming oth Wang, Xinxin oth Enthalten in Elsevier Science Huang, Jian ELSEVIER The head constituent plays a key role in the lexical boost in syntactic priming 2023 Amsterdam [u.a.] (DE-627)ELV010243836 volume:461 year:2016 day:1 month:11 pages:77-86 extent:10 https://doi.org/10.1016/j.palaeo.2016.08.011 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-LING SSG-OPC-ANG 17.00 Sprach- und Literaturwissenschaft: Allgemeines VZ AR 461 2016 1 1101 77-86 10 045F 550 |
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10.1016/j.palaeo.2016.08.011 doi GBVA2016023000026.pica (DE-627)ELV030155126 (ELSEVIER)S0031-0182(16)30329-7 DE-627 ger DE-627 rakwb eng 550 930 550 DE-600 930 DE-600 400 370 150 VZ 5,3 ssgn LING DE-30 fid 17.00 bkl Huang, Xianyu verfasserin aut Paleoclimate significance of n-alkane molecular distributions and δ2H values in surface peats across the monsoon region of China 2016transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. Meyers, Philip A. oth Xue, Jiantao oth Zhang, Yiming oth Wang, Xinxin oth Enthalten in Elsevier Science Huang, Jian ELSEVIER The head constituent plays a key role in the lexical boost in syntactic priming 2023 Amsterdam [u.a.] (DE-627)ELV010243836 volume:461 year:2016 day:1 month:11 pages:77-86 extent:10 https://doi.org/10.1016/j.palaeo.2016.08.011 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-LING SSG-OPC-ANG 17.00 Sprach- und Literaturwissenschaft: Allgemeines VZ AR 461 2016 1 1101 77-86 10 045F 550 |
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10.1016/j.palaeo.2016.08.011 doi GBVA2016023000026.pica (DE-627)ELV030155126 (ELSEVIER)S0031-0182(16)30329-7 DE-627 ger DE-627 rakwb eng 550 930 550 DE-600 930 DE-600 400 370 150 VZ 5,3 ssgn LING DE-30 fid 17.00 bkl Huang, Xianyu verfasserin aut Paleoclimate significance of n-alkane molecular distributions and δ2H values in surface peats across the monsoon region of China 2016transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. Meyers, Philip A. oth Xue, Jiantao oth Zhang, Yiming oth Wang, Xinxin oth Enthalten in Elsevier Science Huang, Jian ELSEVIER The head constituent plays a key role in the lexical boost in syntactic priming 2023 Amsterdam [u.a.] (DE-627)ELV010243836 volume:461 year:2016 day:1 month:11 pages:77-86 extent:10 https://doi.org/10.1016/j.palaeo.2016.08.011 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-LING SSG-OPC-ANG 17.00 Sprach- und Literaturwissenschaft: Allgemeines VZ AR 461 2016 1 1101 77-86 10 045F 550 |
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10.1016/j.palaeo.2016.08.011 doi GBVA2016023000026.pica (DE-627)ELV030155126 (ELSEVIER)S0031-0182(16)30329-7 DE-627 ger DE-627 rakwb eng 550 930 550 DE-600 930 DE-600 400 370 150 VZ 5,3 ssgn LING DE-30 fid 17.00 bkl Huang, Xianyu verfasserin aut Paleoclimate significance of n-alkane molecular distributions and δ2H values in surface peats across the monsoon region of China 2016transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. Meyers, Philip A. oth Xue, Jiantao oth Zhang, Yiming oth Wang, Xinxin oth Enthalten in Elsevier Science Huang, Jian ELSEVIER The head constituent plays a key role in the lexical boost in syntactic priming 2023 Amsterdam [u.a.] (DE-627)ELV010243836 volume:461 year:2016 day:1 month:11 pages:77-86 extent:10 https://doi.org/10.1016/j.palaeo.2016.08.011 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-LING SSG-OPC-ANG 17.00 Sprach- und Literaturwissenschaft: Allgemeines VZ AR 461 2016 1 1101 77-86 10 045F 550 |
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10.1016/j.palaeo.2016.08.011 doi GBVA2016023000026.pica (DE-627)ELV030155126 (ELSEVIER)S0031-0182(16)30329-7 DE-627 ger DE-627 rakwb eng 550 930 550 DE-600 930 DE-600 400 370 150 VZ 5,3 ssgn LING DE-30 fid 17.00 bkl Huang, Xianyu verfasserin aut Paleoclimate significance of n-alkane molecular distributions and δ2H values in surface peats across the monsoon region of China 2016transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. Meyers, Philip A. oth Xue, Jiantao oth Zhang, Yiming oth Wang, Xinxin oth Enthalten in Elsevier Science Huang, Jian ELSEVIER The head constituent plays a key role in the lexical boost in syntactic priming 2023 Amsterdam [u.a.] (DE-627)ELV010243836 volume:461 year:2016 day:1 month:11 pages:77-86 extent:10 https://doi.org/10.1016/j.palaeo.2016.08.011 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-LING SSG-OPC-ANG 17.00 Sprach- und Literaturwissenschaft: Allgemeines VZ AR 461 2016 1 1101 77-86 10 045F 550 |
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paleoclimate significance of n-alkane molecular distributions and δ2h values in surface peats across the monsoon region of china |
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Paleoclimate significance of n-alkane molecular distributions and δ2H values in surface peats across the monsoon region of China |
| abstract |
Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. |
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Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. |
| abstract_unstemmed |
Leaf wax molecular distributions and isotopic values are generally considered paleohydrologic proxies. Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers. |
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Paleoclimate significance of n-alkane molecular distributions and δ2H values in surface peats across the monsoon region of China |
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Here we evaluate the sensitivity of alkane chain length distributions and compound-specific hydrogen isotopic compositions (δ2Halk) in surface peats to environmental parameters across the monsoon region of China. The alkane average chain length (ACL), carbon predominance index (CPI) and δ2Halk values show relatively large variations in multiple samples from a single site, highlighting the complexity of the processes affecting these ratios at small spatial scales. Nonetheless, the site-averaged CPI values correlate significantly with the mean annual temperature (r =−0.57, p(α)<0.001) and precipitation (r =−0.53, p(α)<0.001), suggesting that climate is important to control CPI values, together with other influences. The large variation of δ2Halk values in a single peatland suggests that δ2Halk values may be affected by factors in addition to biosynthetic isotopic discrimination and the D/H ratio of the water available to the plants. It is interesting to note that the site-averaged δ2Halk values correlate poorly with the modeled yearly δ2Hp values. In addition, the site-averaged apparent hydrogen isotope fractionation between C31 n-alkanes and precipitation correlates with mean annual temperature. Together, our results show a relatively complex spatial pattern of δ2Halk values in a single peatland or along a climate transection. Thus, we caution that δ2Halk values would be affected by a series of factors, including the growth season length, the lipid synthesis time, the plant life forms, and/or the hydrogen isotope discrimination during lipid biosynthesis. More study is clearly required to elucidate the major controllers.</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Meyers, Philip A.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Xue, Jiantao</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Zhang, Yiming</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Wang, Xinxin</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="n">Elsevier Science</subfield><subfield code="a">Huang, Jian ELSEVIER</subfield><subfield code="t">The head constituent plays a key role in the lexical boost in syntactic priming</subfield><subfield code="d">2023</subfield><subfield code="g">Amsterdam [u.a.]</subfield><subfield code="w">(DE-627)ELV010243836</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:461</subfield><subfield code="g">year:2016</subfield><subfield code="g">day:1</subfield><subfield code="g">month:11</subfield><subfield code="g">pages:77-86</subfield><subfield code="g">extent:10</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1016/j.palaeo.2016.08.011</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ELV</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">FID-LING</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SSG-OPC-ANG</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">17.00</subfield><subfield code="j">Sprach- und Literaturwissenschaft: Allgemeines</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">461</subfield><subfield code="j">2016</subfield><subfield code="b">1</subfield><subfield code="c">1101</subfield><subfield code="h">77-86</subfield><subfield code="g">10</subfield></datafield><datafield tag="953" ind1=" " ind2=" "><subfield code="2">045F</subfield><subfield code="a">550</subfield></datafield></record></collection>
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