Greenhouse gas emissions from African lakes are no longer a blind spot

被引：55

作者：

Borges, Alberto, V ^{[1
]}

Deirmendjian, Loris ^{[1
,6
,7
]}

Bouillon, Steven ^{[2
]}

Okello, William ^{[3
]}

Lambert, Thibault ^{[1
,8
]}

Roland, Fleur A. E. ^{[1
]}

Razanamahandry, Vao F. ^{[2
]}

Voarintsoa, Ny Riavo G. ^{[2
,9
]}

Darchambeau, Francois ^{[1
,10
]}

Kimirei, Ismael A. ^{[4
]}

Descy, Jean-Pierre ^{[1
]}

Allen, George H. ^{[5
]}

Morana, Cedric ^{[1
,2
]}

机构：

[1] Univ Liege, Chem Oceanog Unit, Liege, Belgium

[2] Katholieke Univ Leuven, Dept Earth & Environm Sci, Leuven, Belgium

[3] Natl Fisheries Resource Res Inst, Dept Limnol, Jinja, Uganda

[4] Tanzania Fisheries Res Inst, Dar Es Salaam, Tanzania

[5] Texas A&M Univ, Dept Geog, College Stn, TX USA

[6] Univ Paul Sabatier, Geosci Environm Toulouse UMR 5563, Toulouse, France

[7] Univ Paul Sabatier, UR 234, IRD, Toulouse, France

[8] Univ Lausanne, Inst Earth Surface Dynam, Lausanne, Switzerland

[9] Univ Houston, Dept Earth & Atmospher Sci, Houston, TX USA

[10] Serv Publ Wallonie, Direct Gen Operat Agr Ressources Nat & Environm, Namur, Belgium

来源：

SCIENCE ADVANCES | 2022年 / 8卷 / 25期

关键词：

DISSOLVED ORGANIC-CARBON; HARD-WATER LAKES; METHANE EMISSIONS; NITROUS-OXIDE; TEMPERATURE-DEPENDENCE; SPATIAL-RESOLUTION; DIOXIDE; CH4; CO2; FLOODPLAIN;

D O I：

10.1126/sciadv.abi8716

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Natural lakes are thought to be globally important sources of greenhouse gases (CO2, CH4, and N2O) to the atmosphere although nearly no data have been previously reported from Africa. We collected CO2, CH4, and N2O data in 24 African lakes that accounted for 49% of total lacustrine surface area of the African continent and covered a wide range of morphology and productivity. The surface water concentrations of dissolved CO2 were much lower than values attributed in current literature to tropical lakes and lower than in boreal systems because of a higher productivity. In contrast, surface water-dissolved CH4 concentrations were generally higher than in boreal systems. The lowest CO2 and the highest CH4 concentrations were observed in the more shallow and productive lakes. Emissions of CO2 may likely have been substantially overestimated by a factor between 9 and 18 in African lakes and between 6 and 26 in pan-tropical lakes.

引用

页数：17

共 120 条

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