GSTDTAP

浏览/检索结果: 共54条,第1-10条 帮助

限定条件                            
已选(0)清除 条数/页:   排序方式:
Millennial-scale hydroclimate control of tropical soil carbon storage 期刊论文
NATURE, 2020, 581 (7806) : 63-+
作者:  Lam, Tommy Tsan-Yuk;  Jia, Na;  Zhang, Ya-Wei;  Shum, Marcus Ho-Hin;  Jiang, Jia-Fu;  Zhu, Hua-Chen;  Tong, Yi-Gang;  Shi, Yong-Xia;  Ni, Xue-Bing;  Liao, Yun-Shi;  Li, Wen-Juan;  Jiang, Bao-Gui;  Wei, Wei;  Yuan, Ting-Ting;  Zheng, Kui;  Cui, Xiao-Ming;  Li, Jie;  Pei, Guang-Qian
收藏  |  浏览/下载:25/0  |  提交时间:2020/05/13

Over the past 18,000 years, the residence time and amount of soil carbon stored in the Ganges-Brahmaputra basin have been controlled by the intensity of Indian Summer Monsoon rainfall, with greater carbon destabilization during wetter, warmer conditions.


The storage of organic carbon in the terrestrial biosphere directly affects atmospheric concentrations of carbon dioxide over a wide range of timescales. Within the terrestrial biosphere, the magnitude of carbon storage can vary in response to environmental perturbations such as changing temperature or hydroclimate(1), potentially generating feedback on the atmospheric inventory of carbon dioxide. Although temperature controls the storage of soil organic carbon at mid and high latitudes(2,3), hydroclimate may be the dominant driver of soil carbon persistence in the tropics(4,5)  however, the sensitivity of tropical soil carbon turnover to large-scale hydroclimate variability remains poorly understood. Here we show that changes in Indian Summer Monsoon rainfall have controlled the residence time of soil carbon in the Ganges-Brahmaputra basin over the past 18,000 years. Comparison of radiocarbon ages of bulk organic carbon and terrestrial higher-plant biomarkers with co-located palaeohydrological records(6) reveals a negative relationship between monsoon rainfall and soil organic carbon stocks on a millennial timescale. Across the deglaciation period, a depletion of basin-wide soil carbon stocks was triggered by increasing rainfall and associated enhanced soil respiration rates. Our results suggest that future hydroclimate changes in tropical regions are likely to accelerate soil carbon destabilization, further increasing atmospheric carbon dioxide concentrations.


  
Intraplate volcanism originating from upwelling hydrous mantle transition zone 期刊论文
NATURE, 2020
作者:  Calabrese, Claudia;  Davidson, Natalie R.;  Demircioglu, Deniz;  Fonseca, Nuno A.;  He, Yao;  Kahles, Andre;  Kjong-Van Lehmann;  Liu, Fenglin;  Shiraishi, Yuichi;  Soulette, Cameron M.;  Urban, Lara;  Greger, Liliana;  Li, Siliang;  Liu, Dongbing;  Perry, Marc D.;  Xiang, Qian;  Zhang, Fan;  Zhang, Junjun;  Bailey, Peter;  Erkek, Serap;  Hoadley, Katherine A.;  Hou, Yong;  Huska, Matthew R.;  Kilpinen, Helena;  Korbel, Jan O.;  Marin, Maximillian G.;  Markowski, Julia;  Nandi, Tannistha;  Pan-Hammarstrom, Qiang;  Pedamallu, Chandra Sekhar;  Siebert, Reiner;  Stark, Stefan G.;  Su, Hong;  Tan, Patrick;  Waszak, Sebastian M.;  Yung, Christina;  Zhu, Shida;  Awadalla, Philip;  Creighton, Chad J.;  Meyerson, Matthew;  Ouellette, B. F. Francis;  Wu, Kui;  Yang, Huanming;  Brazma, Alvis;  Brooks, Angela N.;  Goke, Jonathan;  Raetsch, Gunnar;  Schwarz, Roland F.;  Stegle, Oliver;  Zhang, Zemin
收藏  |  浏览/下载:75/0  |  提交时间:2020/05/13

Most magmatism occurring on Earth is conventionally attributed to passive mantle upwelling at mid-ocean ridges, to slab devolatilization at subduction zones, or to mantle plumes. However, the widespread Cenozoic intraplate volcanism in northeast China(1-3) and the young petit-spot volcanoes(4-7) offshore of the Japan Trench cannot readily be associated with any of these mechanisms. In addition, the mantle beneath these types of volcanism is characterized by zones of anomalously low seismic velocity above and below the transition zone(8-12) (a mantle level located at depths between 410 and 660 kilometres). A comprehensive interpretation of these phenomena is lacking. Here we show that most (or possibly all) of the intraplate and petit-spot volcanism and low-velocity zones around the Japanese subduction zone can be explained by the Cenozoic interaction of the subducting Pacific slab with a hydrous mantle transition zone. Numerical modelling indicates that 0.2 to 0.3 weight per cent of water dissolved in mantle minerals that are driven out from the transition zone in response to subduction and retreat of a tectonic plate is sufficient to reproduce the observations. This suggests that a critical amount of water may have accumulated in the transition zone around this subduction zone, as well as in others of the Tethyan tectonic belt(13) that are characterized by intraplate or petit-spot volcanism and low-velocity zones in the underlying mantle.


The widespread intraplate volcanism in northeast China and the unusual '  petit-spot'  volcanoes offshore Japan could have resulted from the interaction of the subducting Pacific slab with a hydrous mantle transition zone.


  
Climate change and overfishing increase neurotoxicant in marine predators 期刊论文
NATURE, 2019, 572 (7771) : 648-+
作者:  Schartup, Amina T.;  Thackray, Colin P.;  Qureshi, Asif;  Dassuncao, Clifton;  Gillespie, Kyle;  Hanke, Alex;  Sunderland, Elsie M.
收藏  |  浏览/下载:5/0  |  提交时间:2019/11/27
Seasonal to multiannual marine ecosystem prediction with a global Earth system model 期刊论文
SCIENCE, 2019, 365 (6450) : 284-+
作者:  Park, Jong-Yeon;  Stock, Charles A.;  Dunne, John P.;  Yang, Xiaosong;  Rosati, Anthony
收藏  |  浏览/下载:6/0  |  提交时间:2019/11/27
The great Atlantic Sargassum belt 期刊论文
SCIENCE, 2019, 365 (6448) : 83-+
作者:  Wang, Mengqiu;  Hu, Chuanmin;  Barnes, Brian B.;  Mitchum, Gary;  Lapointe, Brian;  Montoya, Joseph P.
收藏  |  浏览/下载:6/0  |  提交时间:2019/11/27
Constraints on global mean sea level during Pliocene warmth 期刊论文
NATURE, 2019, 574 (7777) : 233-+
作者:  Dumitru, Oana A.;  Austermann, Jacqueline;  Polyak, Victor J.;  Fornos, Joan J.;  Asmerom, Yemane;  Gines, Joaquin;  Gines, Angel;  Onac, Bogdan P.
收藏  |  浏览/下载:11/0  |  提交时间:2019/11/27
CLIMATE Ocean cycles sidelined in 20th century temperature record 期刊论文
SCIENCE, 2019, 364 (6443) : 814-814
作者:  Voosen, Paul
收藏  |  浏览/下载:1/0  |  提交时间:2019/11/27
The southern amplifier 期刊论文
SCIENCE, 2019, 363 (6431) : 1040-1041
作者:  Menviel, Laurie
收藏  |  浏览/下载:0/0  |  提交时间:2019/11/27
The residence time of Southern Ocean surface waters and the 100,000-year ice age cycle 期刊论文
SCIENCE, 2019, 363 (6431) : 1080-+
作者:  Hasenfratz, Adam P.;  Jaccard, Samuel L.;  Martinez-Garcia, Alfredo;  Sigman, Daniel M.;  Hodell, David A.;  Vance, Derek;  Bernasconi, Stefano M.;  Kleiven, Helga (Kikki) F.;  Haumann, F. Alexander;  Haug, Gerald H.
收藏  |  浏览/下载:9/0  |  提交时间:2019/11/27
Pantropical climate interactions 期刊论文
SCIENCE, 2019, 363 (6430) : 944-+
作者:  Cai, Wenju;  Wu, Lixin;  Lengaigne, Matthieu;  Li, Tim;  McGregor, Shayne;  Kug, Jong-Seong;  Yu, Jin-Yi;  Stuecker, Malte F.;  Santoso, Agus;  Li, Xichen;  Ham, Yoo-Geun;  Chikamoto, Yoshimitsu;  Ng, Benjamin;  McPhaden, Michael J.;  Du, Yan;  Dommenget, Dietmar;  Jia, Fan;  Kajtar, Jules B.;  Keenlyside, Noel;  Lin, Xiaopei;  Luo, Jing-Jia;  Martin-Rey, Marta;  Ruprich-Robert, Yohan;  Wang, Guojian;  Xie, Shang-Ping;  Yang, Yun;  Kang, Sarah M.;  Choi, Jun-Young;  Gan, Bolan;  Kim, Geon-Il;  Kim, Chang-Eun;  Kim, Sunyoung;  Kim, Jeong-Hwan;  Chang, Ping
收藏  |  浏览/下载:17/0  |  提交时间:2019/11/27