Permafrost Degradation Diminishes Terrestrial Ecosystem Carbon Sequestration Capacity on the Qinghai-Tibetan Plateau

被引：28

作者：

Liu, Lei ^{[1
,2
,3
]}

Zhuang, Qianlai ^{[3
]}

Zhao, Dongsheng ^{[1
]}

Zheng, Du ^{[1
,2
]}

Kou, Dan ^{[3
,4
]}

Yang, Yuanhe ^{[2
,5
]}

机构：

[1] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing, Peoples R China

[2] Univ Chinese Acad Sci, Beijing, Peoples R China

[3] Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA

[4] Univ Eastern Finland, Dept Environm & Biol Sci, Biogeochem Res Grp, Kuopio, Finland

[5] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China

来源：

GLOBAL BIOGEOCHEMICAL CYCLES | 2022年 / 36卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Permafrost degradation; C-N feedbacks; deep soil; Tibetan Plateau; NET PRIMARY PRODUCTIVITY; SOIL ORGANIC-CARBON; CLIMATE-CHANGE; ALPINE MEADOW; ATMOSPHERIC CO2; NITROGEN AVAILABILITY; DYNAMICS; SENSITIVITY; MODEL; VARIABILITY;

D O I：

10.1029/2021GB007068

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Effects of permafrost degradation on carbon (C) and nitrogen (N) cycling on the Qinghai-Tibetan Plateau (QTP) have rarely been analyzed. This study used a revised process-based biogeochemical model to quantify the effects in the region during the 21st century. We found that permafrost degradation would expose 0.61 +/- 0.26 (mean +/- SD) and 1.50 +/- 0.15 Pg C of soil organic carbon under the representative concentration pathway (RCP) 4.5 and the RCP 8.5, respectively. Among them, more than 20% will be decomposed, enhancing heterotrophic respiration by 8.62 +/- 4.51 (RCP 4.5) and 33.66 +/- 14.03 (RCP 8.5) Tg C/yr in 2099. Deep soil N supply due to thawed permafrost is not accessible to plants, only stimulating net primary production by 7.15 +/- 4.83 (RCP 4.5) and 24.27 +/- 9.19 (RCP 8.5) Tg C/yr in 2099. As a result, the single effect of permafrost degradation would cumulatively weaken the regional C sink by 209.44 +/- 137.49 (RCP 4.5) and 371.06 +/- 151.70 (RCP 8.5) Tg C during 2020-2099. However, when factors of climate change, CO2 increasing and permafrost degradation are all considered, the permafrost region on the QTP would be a stronger C sink in the 21st century. Permafrost degradation has a greater influence on C balance of alpine meadows than alpine steppes on the QTP. The shallower active layer, higher soil C and N stocks, and wetter environment in alpine meadows are responsible for its stronger response to permafrost degradation. This study highlights that permafrost degradation could continue to release large amounts of C to the atmosphere irrespective of potentially more nitrogen available from deep soils.

引用

页数：20

共 111 条

[1] Biomass offsets little or none of permafrost carbon release from soils, streams, and wildfire: an expert assessment [J].

Abbott, Benjamin W. ;

Jones, Jeremy B. ;

Schuur, Edward A. G. ;

Chapin, F. Stuart, III ;

Bowden, William B. ;

Bret-Harte, M. Syndonia ;

Epstein, Howard E. ;

Flannigan, Michael D. ;

Harms, Tamara K. ;

Hollingsworth, Teresa N. ;

Mack, Michelle C. ;

McGuire, A. David ;

Natali, Susan M. ;

Rocha, Adrian V. ;

Tank, Suzanne E. ;

Turetsky, Merritt R. ;

Vonk, Jorien E. ;

Wickland, Kimberly P. ;

Aiken, George R. ;

Alexander, Heather D. ;

Amon, Rainer M. W. ;

Benscoter, Brian W. ;

Bergeron, Yves ;

Bishop, Kevin ;

Blarquez, Olivier ;

Bond-Lamberty, Ben ;

Breen, Amy L. ;

Buffam, Ishi ;

Cai, Yihua ;

Carcaillet, Christopher ;

Carey, Sean K. ;

Chen, Jing M. ;

Chen, Han Y. H. ;

Christensen, Torben R. ;

Cooper, Lee W. ;

Cornelissen, J. Hans C. ;

de Groot, William J. ;

DeLuca, Thomas H. ;

Dorrepaal, Ellen ;

Fetcher, Ned ;

Finlay, Jacques C. ;

Forbes, Bruce C. ;

French, Nancy H. F. ;

Gauthier, Sylvie ;

Girardin, Martin P. ;

Goetz, Scott J. ;

Goldammer, Johann G. ;

Gough, Laura ;

Grogan, Paul ;

Guo, Laodong .

ENVIRONMENTAL RESEARCH LETTERS, 2016, 11 (03)

[2] Soil microbial biomass and extracellular enzymes regulate nitrogen mineralization in a wheat-maize cropping system after three decades of fertilization in a Chinese Ferrosol [J].

Ali, Sehrish ;

Dongchu Li ;

Jing, Huang ;

Ahmed, Waqas ;

Abbas, Muhammad ;

Qaswar, Muhammad ;

Anthonio, Christian Kofi ;

Lu, Zhang ;

Boren Wang ;

Yongmei Xu ;

Huimin Zhang .

JOURNAL OF SOILS AND SEDIMENTS, 2021, 21 (01) :281-294

[3] Dwelling in the deep - strongly increased root growth and rooting depth enhance plant interactions with thawing permafrost soil [J].

Blume-Werry, Gesche ;

Milbau, Ann ;

Teuber, Laurenz M. ;

Johansson, Margareta ;

Dorrepaal, Ellen .

NEW PHYTOLOGIST, 2019, 223 (03) :1328-1339

[4] Potential CO2 emissions from defrosting permafrost soils of the Qinghai-Tibet Plateau under different scenarios of climate change in 2050 and 2070 [J].

Bosch, Anna ;

Schmidt, Karsten ;

He, Jin-Sheng ;

Doerfer, Corina ;

Scholten, Thomas .

CATENA, 2017, 149 :221-231

[5] Quantifying uncertainties of permafrost carbon-climate feedbacks [J].

Burke, Eleanor J. ;

Ekici, Altug ;

Huang, Ye ;

Chadburn, Sarah E. ;

Huntingford, Chris ;

Ciais, Philippe ;

Friedlingstein, Pierre ;

Peng, Shushi ;

Krinner, Gerhard .

BIOGEOSCIENCES, 2017, 14 (12) :3051-3066

[6] Estimating the Permafrost-Carbon Climate Response in the CMIP5 Climate Models Using a Simplified Approach [J].

Burke, Eleanor J. ;

Jones, Chris D. ;

Koven, Charles D. .

JOURNAL OF CLIMATE, 2013, 26 (14) :4897-4909

[7] The impact of climate change and anthropogenic activities on alpine grassland over the Qinghai-Tibet Plateau [J].

Chen, Baoxiong ;

Zhang, Xianzhou ;

Tao, Jian ;

Wu, Jianshuang ;

Wang, Jingsheng ;

Shi, Peili ;

Zhang, Yangjian ;

Yu, Chengqun .

AGRICULTURAL AND FOREST METEOROLOGY, 2014, 189 :11-18

[8] Determinants of carbon release from the active layer and permafrost deposits on the Tibetan Plateau [J].

Chen, Leiyi ;

Liang, Junyi ;

Qin, Shuqi ;

Liu, Li ;

Fang, Kai ;

Xu, Yunping ;

Ding, Jinzhi ;

Li, Fei ;

Luo, Yiqi ;

Yang, Yuanhe .

NATURE COMMUNICATIONS, 2016, 7

[9] Quantifying global soil carbon losses in response to warming [J].

Crowther, T. W. ;

Todd-Brown, K. E. O. ;

Rowe, C. W. ;

Wieder, W. R. ;

Carey, J. C. ;

Machmuller, M. B. ;

Snoek, B. L. ;

Fang, S. ;

Zhou, G. ;

Allison, S. D. ;

Blair, J. M. ;

Bridgham, S. D. ;

Burton, A. J. ;

Carrillo, Y. ;

Reich, P. B. ;

Clark, J. S. ;

Classen, A. T. ;

Dijkstra, F. A. ;

Elberling, B. ;

Emmett, B. A. ;

Estiarte, M. ;

Frey, S. D. ;

Guo, J. ;

Harte, J. ;

Jiang, L. ;

Johnson, B. R. ;

Kroel-Dulay, G. ;

Larsen, K. S. ;

Laudon, H. ;

Lavallee, J. M. ;

Luo, Y. ;

Lupascu, M. ;

Ma, L. N. ;

Marhan, S. ;

Michelsen, A. ;

Mohan, J. ;

Niu, S. ;

Pendall, E. ;

Penuelas, J. ;

Pfeifer-Meister, L. ;

Poll, C. ;

Reinsch, S. ;

Reynolds, L. L. ;

Schmidt, I. K. ;

Sistla, S. ;

Sokol, N. W. ;

Templer, P. H. ;

Treseder, K. K. ;

Welker, J. M. ;

Bradford, M. A. .

NATURE, 2016, 540 (7631) :104-+

[10]

Ding JZ, 2017, NAT GEOSCI, V10, P420, DOI [10.1038/NGEO2945, 10.1038/ngeo2945]

← 1 2 3 4 5 6 7 8 9 10 →