Wetlands Cool Land Surface Temperature in Tropical Regions but Warm in Boreal Regions
Wetlands play a critical role in global hydrological and biogeochemical cycles. Regulating the regional climate is one of the most important ecosystem services of natural wetlands. However, the impact of wetlands on local temperature on the global scale and the attribution is still unclear. This stu...
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doaj-6333cc4a732347ebb66a48a564a875cf2021-04-08T23:04:38ZengMDPI AGRemote Sensing2072-42922021-04-01131439143910.3390/rs13081439Wetlands Cool Land Surface Temperature in Tropical Regions but Warm in Boreal RegionsYuxuan Wu0Yi Xi1Maoyuan Feng2Shushi Peng3Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, ChinaSino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, ChinaSino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, ChinaSino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, ChinaWetlands play a critical role in global hydrological and biogeochemical cycles. Regulating the regional climate is one of the most important ecosystem services of natural wetlands. However, the impact of wetlands on local temperature on the global scale and the attribution is still unclear. This study utilizes the satellite-based products (land surface temperature (LST), albedo, and evapotranspiration (ET)) to evaluate the difference in LST between wetlands and their adjacent landcover types and the possible drivers. Here we show that on average for the whole year, wetlands have a cooling effect in tropical regions, but have a warming effect in boreal regions. The impacts of wetlands on LST show great seasonality in the boreal regions; i.e., the wetlands have a warming effect in winter but a cooling effect in summer. The difference in albedo and ET between wetlands and the other landcover types only interprets 30% of temporal variation of the difference in LST. Due to the large water storage in wetlands, the ground heat flux (G) may interpret the rest of the impact, absorbing energy in summer and releasing energy in winter in wetlands, which has often been neglected in previous studies. Our results indicate that it is critical to comprehensively consider the effects of wetland restoration in different regions to realize potential climatic benefits in the future.https://www.mdpi.com/2072-4292/13/8/1439wetlandsland surface temperaturesurface energy balancealbedoevapotranspirationremote sensing |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yuxuan Wu Yi Xi Maoyuan Feng Shushi Peng |
spellingShingle |
Yuxuan Wu Yi Xi Maoyuan Feng Shushi Peng Wetlands Cool Land Surface Temperature in Tropical Regions but Warm in Boreal Regions Remote Sensing wetlands land surface temperature surface energy balance albedo evapotranspiration remote sensing |
author_facet |
Yuxuan Wu Yi Xi Maoyuan Feng Shushi Peng |
author_sort |
Yuxuan Wu |
title |
Wetlands Cool Land Surface Temperature in Tropical Regions but Warm in Boreal Regions |
title_short |
Wetlands Cool Land Surface Temperature in Tropical Regions but Warm in Boreal Regions |
title_full |
Wetlands Cool Land Surface Temperature in Tropical Regions but Warm in Boreal Regions |
title_fullStr |
Wetlands Cool Land Surface Temperature in Tropical Regions but Warm in Boreal Regions |
title_full_unstemmed |
Wetlands Cool Land Surface Temperature in Tropical Regions but Warm in Boreal Regions |
title_sort |
wetlands cool land surface temperature in tropical regions but warm in boreal regions |
publisher |
MDPI AG |
series |
Remote Sensing |
issn |
2072-4292 |
publishDate |
2021-04-01 |
description |
Wetlands play a critical role in global hydrological and biogeochemical cycles. Regulating the regional climate is one of the most important ecosystem services of natural wetlands. However, the impact of wetlands on local temperature on the global scale and the attribution is still unclear. This study utilizes the satellite-based products (land surface temperature (LST), albedo, and evapotranspiration (ET)) to evaluate the difference in LST between wetlands and their adjacent landcover types and the possible drivers. Here we show that on average for the whole year, wetlands have a cooling effect in tropical regions, but have a warming effect in boreal regions. The impacts of wetlands on LST show great seasonality in the boreal regions; i.e., the wetlands have a warming effect in winter but a cooling effect in summer. The difference in albedo and ET between wetlands and the other landcover types only interprets 30% of temporal variation of the difference in LST. Due to the large water storage in wetlands, the ground heat flux (G) may interpret the rest of the impact, absorbing energy in summer and releasing energy in winter in wetlands, which has often been neglected in previous studies. Our results indicate that it is critical to comprehensively consider the effects of wetland restoration in different regions to realize potential climatic benefits in the future. |
topic |
wetlands land surface temperature surface energy balance albedo evapotranspiration remote sensing |
url |
https://www.mdpi.com/2072-4292/13/8/1439 |
work_keys_str_mv |
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