The effects of small water bodies on the atmospheric heat and water budgets over the MacKenzie River Basin
Abstract The effects of small water bodies or lakes on the surface sensible and latent heat fluxes and the transport of heat and water vapour in the atmospheric boundary layer (ABL) over the Mackenzie River Basin (MRB) are studied from two cases, which occurred on 2 and 8 June 1999 during the warm s...
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crwiley:10.1002/hyp.1338 2024-06-02T08:10:14+00:00 The effects of small water bodies on the atmospheric heat and water budgets over the MacKenzie River Basin Nagarajan, Badrinath Yau, M. K. Schuepp, P. H. 2004 http://dx.doi.org/10.1002/hyp.1338 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.1338 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.1338 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Hydrological Processes volume 18, issue 5, page 913-938 ISSN 0885-6087 1099-1085 journal-article 2004 crwiley https://doi.org/10.1002/hyp.1338 2024-05-03T10:43:18Z Abstract The effects of small water bodies or lakes on the surface sensible and latent heat fluxes and the transport of heat and water vapour in the atmospheric boundary layer (ABL) over the Mackenzie River Basin (MRB) are studied from two cases, which occurred on 2 and 8 June 1999 during the warm season. The synoptic condition for the cases is representative of about 33% of the synoptic situation over the MRB. The two events are simulated using the Canadian mesoscale compressible community (MC2) model. A one‐way nesting grid approach is employed with the highest resolution of 100 m over a domain of 100 km 2 . Experiments were conducted with (LAKE) and without (NOLAKE) the presence of small water bodies, whose size distribution is obtained through an inversion algorithm using information of their linear dimension determined from aircraft measurement of surface temperature during MAGS (the Mackenzie GEWEX (Global Energy and Water Cycle Experiment) Study) in 1999. The water bodies are assumed to be distributed randomly in space with a fractional area coverage of 10% over the MRB. The results show that, in the presence of lakes, the domain‐averaged surface sensible heat flux on 2 June 1999 (8 June 1999) decreases by 9·3% (6·6%). The surface latent heat flux is enhanced by 18·2% (81·5%). Low‐level temperature advection and the lake surface temperature affect the air–land/lake temperature contrast, which in turn controls the sensible heat flux. In the absence of lakes the surface wind speed impacts the latent heat flux, but in the presence of lakes the moisture availability and the atmospheric surface layer stability control the latent heat flux. The enhancement is smaller on 2 June 1999 as a result of a stable surface layer caused by the presence of colder lake temperatures. The domain‐averaged apparent heat source and moisture sink due to turbulent transports were also computed. The results show that, when lakes are present, heating and drying occur in the lowest 100 m from the surface. Above 100 m and within the ... Article in Journal/Newspaper Mackenzie river Wiley Online Library Mackenzie River Hydrological Processes 18 5 913 938 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The effects of small water bodies or lakes on the surface sensible and latent heat fluxes and the transport of heat and water vapour in the atmospheric boundary layer (ABL) over the Mackenzie River Basin (MRB) are studied from two cases, which occurred on 2 and 8 June 1999 during the warm season. The synoptic condition for the cases is representative of about 33% of the synoptic situation over the MRB. The two events are simulated using the Canadian mesoscale compressible community (MC2) model. A one‐way nesting grid approach is employed with the highest resolution of 100 m over a domain of 100 km 2 . Experiments were conducted with (LAKE) and without (NOLAKE) the presence of small water bodies, whose size distribution is obtained through an inversion algorithm using information of their linear dimension determined from aircraft measurement of surface temperature during MAGS (the Mackenzie GEWEX (Global Energy and Water Cycle Experiment) Study) in 1999. The water bodies are assumed to be distributed randomly in space with a fractional area coverage of 10% over the MRB. The results show that, in the presence of lakes, the domain‐averaged surface sensible heat flux on 2 June 1999 (8 June 1999) decreases by 9·3% (6·6%). The surface latent heat flux is enhanced by 18·2% (81·5%). Low‐level temperature advection and the lake surface temperature affect the air–land/lake temperature contrast, which in turn controls the sensible heat flux. In the absence of lakes the surface wind speed impacts the latent heat flux, but in the presence of lakes the moisture availability and the atmospheric surface layer stability control the latent heat flux. The enhancement is smaller on 2 June 1999 as a result of a stable surface layer caused by the presence of colder lake temperatures. The domain‐averaged apparent heat source and moisture sink due to turbulent transports were also computed. The results show that, when lakes are present, heating and drying occur in the lowest 100 m from the surface. Above 100 m and within the ... |
format |
Article in Journal/Newspaper |
author |
Nagarajan, Badrinath Yau, M. K. Schuepp, P. H. |
spellingShingle |
Nagarajan, Badrinath Yau, M. K. Schuepp, P. H. The effects of small water bodies on the atmospheric heat and water budgets over the MacKenzie River Basin |
author_facet |
Nagarajan, Badrinath Yau, M. K. Schuepp, P. H. |
author_sort |
Nagarajan, Badrinath |
title |
The effects of small water bodies on the atmospheric heat and water budgets over the MacKenzie River Basin |
title_short |
The effects of small water bodies on the atmospheric heat and water budgets over the MacKenzie River Basin |
title_full |
The effects of small water bodies on the atmospheric heat and water budgets over the MacKenzie River Basin |
title_fullStr |
The effects of small water bodies on the atmospheric heat and water budgets over the MacKenzie River Basin |
title_full_unstemmed |
The effects of small water bodies on the atmospheric heat and water budgets over the MacKenzie River Basin |
title_sort |
effects of small water bodies on the atmospheric heat and water budgets over the mackenzie river basin |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1002/hyp.1338 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.1338 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.1338 |
geographic |
Mackenzie River |
geographic_facet |
Mackenzie River |
genre |
Mackenzie river |
genre_facet |
Mackenzie river |
op_source |
Hydrological Processes volume 18, issue 5, page 913-938 ISSN 0885-6087 1099-1085 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/hyp.1338 |
container_title |
Hydrological Processes |
container_volume |
18 |
container_issue |
5 |
container_start_page |
913 |
op_container_end_page |
938 |
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1800756064232144896 |