Global increase in methane production under future warming of lake bottom waters.
Global increase in methane production under future warming of lake bottom waters.
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未来湖底沃茨变暖下全球甲烷产量的增加。
DOI：
10.1111/gcb.16298
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发表时间：
2022-09
影响因子：
11.6
通讯作者：
中科院分区：
文献类型：
--
作者：
湖泊是大气中甲烷的重要排放源，因此是全球甲烷预算的重要组成部分。甲烷通常在湖泊沉积物中产生，甲烷产生的速率强烈依赖于温度。地方和区域研究强调了在未来气候变化下甲烷产量增加的风险，但目前还没有全球估计。在这里，我们预测从1901年到2099年全球湖底温度和沉积物甲烷生产率的变化。到21世纪末，全球湖底温度预计将上升，在代表性浓度路径（RCPs）2.6-8.5下，平均上升0.86-2.60°C，预计低纬度地区的变暖幅度更大。未来底层沃茨的变暖可能会导致甲烷生产率在世纪末增加13%-40%，许多低纬度湖泊在RCP 8.5下的增长率高达历史（1970-1999）全球平均水平的17倍。预计甲烷产量的增加可能会导致湖泊排放量的增加，尽管排放量增加的确切幅度需要进行更详细的区域研究。到21世纪末，在不同的气候变暖情景（RCP）下，全球湖底水温度（上图）的预计变化将推动未来甲烷生成率（下图）的增加。ISIMIP 2b湖区（1901年至2099年）的全球湖泊温度模拟与来自湖泊沉积物孵育的甲烷生成的Arkanius型温度函数相结合。虽然北方湖泊的底层水变暖因水柱分层增加而减弱，但热带地区的湖底沃茨变暖更大，加上温度较高时甲烷生成的温度敏感性增加，表明热带湖泊将经历甲烷产量的最大增加。
Lakes are significant emitters of methane to the atmosphere, and thus are important components of the global methane budget. Methane is typically produced in lake sediments, with the rate of methane production being strongly temperature dependent. Local and regional studies highlight the risk of increasing methane production under future climate change, but a global estimate is not currently available. Here, we project changes in global lake bottom temperatures and sediment methane production rates from 1901 to 2099. By the end of the 21st century, lake bottom temperatures are projected to increase globally, by an average of 0.86–2.60°C under Representative Concentration Pathways (RCPs) 2.6–8.5, with greater warming projected at lower latitudes. This future warming of bottom waters will likely result in an increase in methane production rates of 13%–40% by the end of the century, with many low‐latitude lakes experiencing an increase of up to 17 times the historical (1970–1999) global average under RCP 8.5. The projected increase in methane production will likely lead to higher emissions from lakes, although the exact magnitude of the emission increase requires more detailed regional studies. Projected changes in global lake bottom water temperatures (top) drive future increases in methanogenesis rates (bottom) under different climate warming scenarios (RCPs) by the end of the 21st century. Global lake temperature simulations of the ISIMIP2b Lake Sector (1901 to 2099), were combined with an Arrhenius‐type temperature function of methanogenesis derived from lake sediment incubations. While bottom water warming in northern lakes is muted by increased water column stratification, greater warming of lake bottom waters in the tropics, combined with increased temperature sensitivity of methanogenesis at higher temperatures suggest that tropical lakes will experience the largest increases in methane production.
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影响因子：
16.6
作者：
Beaulieu, Jake J.;DelSontro, Tonya;Downing, John A.
通讯作者：
Downing, John A.
影响因子：
3.7
作者：
Bastviken, David;Cole, Jonathan J.;Van de Bogert, Matthew C.
通讯作者：
Van de Bogert, Matthew C.
影响因子：
16.6
作者：
Emilson EJS;Carson MA;Yakimovich KM;Osterholz H;Dittmar T;Gunn JM;Mykytczuk NCS;Basiliko N;Tanentzap AJ
通讯作者：
Tanentzap AJ
DOI：
10.3402/tellusa.v66.21510
发表时间：
2014-01-01
影响因子：
2
作者：
Choulga, Margarita;Kourzeneva, Ekaterina;Doganovsky, Arkady
通讯作者：
Doganovsky, Arkady
影响因子：
5.1
作者：
Golub, Malgorzata;Thiery, Wim;Zdorovennova, Galina
通讯作者：
Zdorovennova, Galina