Variability in cold front activities modulating cool-season evaporation from a southern inland water in the USA
Understanding seasonal variations in the evaporation of inland waters (e.g., lakes and reservoirs) is important for water resource management as well as the prediction of the hydrological cycles in response to climate change. We analyzed eddy covariance-based evaporation measurements from the Ross B...
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Online Access: | http://hdl.handle.net/10138/161972 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/161972 2024-01-07T09:43:28+01:00 Variability in cold front activities modulating cool-season evaporation from a southern inland water in the USA Liu, Heping Blanken, Peter D. Weidinger, Tamas Nordbo, Annika Vesala, Timo Department of Physics Ecosystem processes (INAR Forest Sciences) Micrometeorology and biogeochemical cycles 2016-05-13T07:56:01Z 8 application/pdf http://hdl.handle.net/10138/161972 eng eng IOP Publishing 10.1088/1748-9326/6/2/024022 Liu , H , Blanken , P D , Weidinger , T , Nordbo , A & Vesala , T 2011 , ' Variability in cold front activities modulating cool-season evaporation from a southern inland water in the USA ' , Environmental Research Letters , vol. 6 , no. 2 , pp. 024022 . https://doi.org/10.1088/1748-9326/6/2/024022 79960297202 65c9cc96-5768-46dc-8996-d5714a9ae25a http://hdl.handle.net/10138/161972 000295326800022 cc_by openAccess info:eu-repo/semantics/openAccess lake/reservoir evaporation eddy covariance fluxes cold fronts the surface energy budget GREAT SLAVE LAKE EDDY COVARIANCE MEASUREMENTS ENERGY-BALANCE SIMULATION EXCHANGE Article publishedVersion 2016 ftunivhelsihelda 2023-12-14T00:03:05Z Understanding seasonal variations in the evaporation of inland waters (e.g., lakes and reservoirs) is important for water resource management as well as the prediction of the hydrological cycles in response to climate change. We analyzed eddy covariance-based evaporation measurements from the Ross Barnett Reservoir (32◦26N, 90◦02W; which is always ice-free) in central Mississippi during the cool months (i.e., September–March) of 2007 and 2008, and found that the variability in cold front activities (i.e., passages of cold fronts and cold/dry air masses behind cold fronts) played an important role in modulating the exchange of sensible (H) and latent (λE) heat fluxes. Our analysis showed that 2007’s warmer cool season had smaller mean H and λE than 2008’s cooler cool season. This implies that the warmer cool season did not accelerate evaporation and heat exchange between the water surface and the atmosphere. Instead, more frequent cold fronts and longer periods of cold/dry air masses behind the cold fronts in 2008 resulted in overall larger H and λE as compared with 2007, this primarily taking the form of sporadic short-term rapid ‘pulses’ of H and λE losses from the water’s surface. These results suggest that future climate-induced changes in frequency of cold fronts and the meteorological properties of the air masses behind cold fronts (e.g., wind speeds, temperature, and humidity), rather than other factors of climate change, would produce significant variations in the water surface’s energy fluxes and subsequent evaporation rates. Peer reviewed Article in Journal/Newspaper Great Slave Lake HELDA – University of Helsinki Open Repository Great Slave Lake ENVELOPE(-114.001,-114.001,61.500,61.500) Environmental Research Letters 6 2 024022 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
lake/reservoir evaporation eddy covariance fluxes cold fronts the surface energy budget GREAT SLAVE LAKE EDDY COVARIANCE MEASUREMENTS ENERGY-BALANCE SIMULATION EXCHANGE |
spellingShingle |
lake/reservoir evaporation eddy covariance fluxes cold fronts the surface energy budget GREAT SLAVE LAKE EDDY COVARIANCE MEASUREMENTS ENERGY-BALANCE SIMULATION EXCHANGE Liu, Heping Blanken, Peter D. Weidinger, Tamas Nordbo, Annika Vesala, Timo Variability in cold front activities modulating cool-season evaporation from a southern inland water in the USA |
topic_facet |
lake/reservoir evaporation eddy covariance fluxes cold fronts the surface energy budget GREAT SLAVE LAKE EDDY COVARIANCE MEASUREMENTS ENERGY-BALANCE SIMULATION EXCHANGE |
description |
Understanding seasonal variations in the evaporation of inland waters (e.g., lakes and reservoirs) is important for water resource management as well as the prediction of the hydrological cycles in response to climate change. We analyzed eddy covariance-based evaporation measurements from the Ross Barnett Reservoir (32◦26N, 90◦02W; which is always ice-free) in central Mississippi during the cool months (i.e., September–March) of 2007 and 2008, and found that the variability in cold front activities (i.e., passages of cold fronts and cold/dry air masses behind cold fronts) played an important role in modulating the exchange of sensible (H) and latent (λE) heat fluxes. Our analysis showed that 2007’s warmer cool season had smaller mean H and λE than 2008’s cooler cool season. This implies that the warmer cool season did not accelerate evaporation and heat exchange between the water surface and the atmosphere. Instead, more frequent cold fronts and longer periods of cold/dry air masses behind the cold fronts in 2008 resulted in overall larger H and λE as compared with 2007, this primarily taking the form of sporadic short-term rapid ‘pulses’ of H and λE losses from the water’s surface. These results suggest that future climate-induced changes in frequency of cold fronts and the meteorological properties of the air masses behind cold fronts (e.g., wind speeds, temperature, and humidity), rather than other factors of climate change, would produce significant variations in the water surface’s energy fluxes and subsequent evaporation rates. Peer reviewed |
author2 |
Department of Physics Ecosystem processes (INAR Forest Sciences) Micrometeorology and biogeochemical cycles |
format |
Article in Journal/Newspaper |
author |
Liu, Heping Blanken, Peter D. Weidinger, Tamas Nordbo, Annika Vesala, Timo |
author_facet |
Liu, Heping Blanken, Peter D. Weidinger, Tamas Nordbo, Annika Vesala, Timo |
author_sort |
Liu, Heping |
title |
Variability in cold front activities modulating cool-season evaporation from a southern inland water in the USA |
title_short |
Variability in cold front activities modulating cool-season evaporation from a southern inland water in the USA |
title_full |
Variability in cold front activities modulating cool-season evaporation from a southern inland water in the USA |
title_fullStr |
Variability in cold front activities modulating cool-season evaporation from a southern inland water in the USA |
title_full_unstemmed |
Variability in cold front activities modulating cool-season evaporation from a southern inland water in the USA |
title_sort |
variability in cold front activities modulating cool-season evaporation from a southern inland water in the usa |
publisher |
IOP Publishing |
publishDate |
2016 |
url |
http://hdl.handle.net/10138/161972 |
long_lat |
ENVELOPE(-114.001,-114.001,61.500,61.500) |
geographic |
Great Slave Lake |
geographic_facet |
Great Slave Lake |
genre |
Great Slave Lake |
genre_facet |
Great Slave Lake |
op_relation |
10.1088/1748-9326/6/2/024022 Liu , H , Blanken , P D , Weidinger , T , Nordbo , A & Vesala , T 2011 , ' Variability in cold front activities modulating cool-season evaporation from a southern inland water in the USA ' , Environmental Research Letters , vol. 6 , no. 2 , pp. 024022 . https://doi.org/10.1088/1748-9326/6/2/024022 79960297202 65c9cc96-5768-46dc-8996-d5714a9ae25a http://hdl.handle.net/10138/161972 000295326800022 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
container_title |
Environmental Research Letters |
container_volume |
6 |
container_issue |
2 |
container_start_page |
024022 |
_version_ |
1787424722393235456 |