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Mapping global lake dynamics reveals the emerging roles of small lakes
journal contribution
posted on 2022-11-24, 23:43 authored by X Pi, Q Luo, L Feng, Y Xu, J Tang, X Liang, E Ma, R Cheng, R Fensholt, M Brandt, X Cai, L Gibson, J Liu, C Zheng, W Li, Brett BryanBrett BryanAbstractLakes are important natural resources and carbon gas emitters and are undergoing rapid changes worldwide in response to climate change and human activities. A detailed global characterization of lakes and their long-term dynamics does not exist, which is however crucial for evaluating the associated impacts on water availability and carbon emissions. Here, we map 3.4 million lakes on a global scale, including their explicit maximum extents and probability-weighted area changes over the past four decades. From the beginning period (1984–1999) to the end (2010–2019), the lake area increased across all six continents analyzed, with a net change of +46,278 km2, and 56% of the expansion was attributed to reservoirs. Interestingly, although small lakes (<1 km2) accounted for just 15% of the global lake area, they dominated the variability in total lake size in half of the global inland lake regions. The identified lake area increase over time led to higher lacustrine carbon emissions, mostly attributed to small lakes. Our findings illustrate the emerging roles of small lakes in regulating not only local inland water variability, but also the global trends of surface water extent and carbon emissions.
History
Journal
Nature CommunicationsVolume
13Article number
5777Pagination
1-12Location
London, Eng.Publisher DOI
ISSN
2041-1723eISSN
2041-1723Language
EnglishPublication classification
C1 Refereed article in a scholarly journalIssue
1Publisher
Nature Publishing GroupUsage metrics
Keywords
BIODIVERSITYCLIMATE-CHANGEDECLINEDROUGHTEMISSIONSINTEGRATORSMultidisciplinary SciencesREGULATORSRESERVOIRSScience & TechnologyScience & Technology - Other TopicsSENTINELSSURFACE-WATERCarbonClimate ChangeHumansLakesWater13 Climate ActionSchool of Life and Environmental SciencesFaculty of Science Engineering and Built EnvironmentEnvironmental Science and Management not elsewhere classified
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