Seasonality in the Surface Energy Balance of Tundra in the Lower Mackenzie River Basin
This study details seasonal characteristics in the annual surface energy balance of upland and lowland tundra during the 1998–99 water year (Y2). It contrasts the results with the 1997–98 water year (Y1) and relates the findings to the climatic normals for the lower Mackenzie River basin region. Bot...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.532.3160 2023-05-15T17:09:40+02:00 Seasonality in the Surface Energy Balance of Tundra in the Lower Mackenzie River Basin Wayne R. Rouse Andrea K. Eaton Richard M. Petrone L. Dale Boudreau Philip Marsh Timothy J. Griffis The Pennsylvania State University CiteSeerX Archives 2002 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.3160 http://www.biometeorology.umn.edu/pdf/Mackenzie_03.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.3160 http://www.biometeorology.umn.edu/pdf/Mackenzie_03.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.biometeorology.umn.edu/pdf/Mackenzie_03.pdf text 2002 ftciteseerx 2016-01-08T10:39:59Z This study details seasonal characteristics in the annual surface energy balance of upland and lowland tundra during the 1998–99 water year (Y2). It contrasts the results with the 1997–98 water year (Y1) and relates the findings to the climatic normals for the lower Mackenzie River basin region. Both years were much warmer than the long-term average, with Y1 being both warmer and wetter than Y2. Six seasons are defined as early winter, midwinter, late winter, spring, summer, and fall. The most rapid changes in the surface energy balance occur in spring, fall, and late winter. Of these, spring is the most dynamic, and there is distinct asymmetry between rates of change in spring and those in fall. Rates of change of potential insolation (extraterrestrial solar radiation) in late winter, spring, and fall are within 10 % of one another, being highest in late winter and smallest in spring. Rates of change in air temperature and ground temperature are twice as large in spring as in fall and late winter, when they are about the same. Rates of change in components of the energy balance in spring are twice and 4 times as large as in fall and late winter, respectively. The timing of snowpack ripening and snowmelt is the major agent determining the magnitude of asymmetry between fall and spring. This timing is a result of interaction between the solar cycle, air temperature, and snowpack longevity. Based on evidence from this study, potential surface responses to a 18C increase in air temperature are small to moderate in most seasons, but are large in spring when increases range from 7 % to 10 % of average surface energy fluxes. 1. Text Mackenzie river Tundra Unknown Mackenzie River Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) |
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ftciteseerx |
language |
English |
description |
This study details seasonal characteristics in the annual surface energy balance of upland and lowland tundra during the 1998–99 water year (Y2). It contrasts the results with the 1997–98 water year (Y1) and relates the findings to the climatic normals for the lower Mackenzie River basin region. Both years were much warmer than the long-term average, with Y1 being both warmer and wetter than Y2. Six seasons are defined as early winter, midwinter, late winter, spring, summer, and fall. The most rapid changes in the surface energy balance occur in spring, fall, and late winter. Of these, spring is the most dynamic, and there is distinct asymmetry between rates of change in spring and those in fall. Rates of change of potential insolation (extraterrestrial solar radiation) in late winter, spring, and fall are within 10 % of one another, being highest in late winter and smallest in spring. Rates of change in air temperature and ground temperature are twice as large in spring as in fall and late winter, when they are about the same. Rates of change in components of the energy balance in spring are twice and 4 times as large as in fall and late winter, respectively. The timing of snowpack ripening and snowmelt is the major agent determining the magnitude of asymmetry between fall and spring. This timing is a result of interaction between the solar cycle, air temperature, and snowpack longevity. Based on evidence from this study, potential surface responses to a 18C increase in air temperature are small to moderate in most seasons, but are large in spring when increases range from 7 % to 10 % of average surface energy fluxes. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Wayne R. Rouse Andrea K. Eaton Richard M. Petrone L. Dale Boudreau Philip Marsh Timothy J. Griffis |
spellingShingle |
Wayne R. Rouse Andrea K. Eaton Richard M. Petrone L. Dale Boudreau Philip Marsh Timothy J. Griffis Seasonality in the Surface Energy Balance of Tundra in the Lower Mackenzie River Basin |
author_facet |
Wayne R. Rouse Andrea K. Eaton Richard M. Petrone L. Dale Boudreau Philip Marsh Timothy J. Griffis |
author_sort |
Wayne R. Rouse |
title |
Seasonality in the Surface Energy Balance of Tundra in the Lower Mackenzie River Basin |
title_short |
Seasonality in the Surface Energy Balance of Tundra in the Lower Mackenzie River Basin |
title_full |
Seasonality in the Surface Energy Balance of Tundra in the Lower Mackenzie River Basin |
title_fullStr |
Seasonality in the Surface Energy Balance of Tundra in the Lower Mackenzie River Basin |
title_full_unstemmed |
Seasonality in the Surface Energy Balance of Tundra in the Lower Mackenzie River Basin |
title_sort |
seasonality in the surface energy balance of tundra in the lower mackenzie river basin |
publishDate |
2002 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.3160 http://www.biometeorology.umn.edu/pdf/Mackenzie_03.pdf |
long_lat |
ENVELOPE(139.931,139.931,-66.690,-66.690) |
geographic |
Mackenzie River Midwinter |
geographic_facet |
Mackenzie River Midwinter |
genre |
Mackenzie river Tundra |
genre_facet |
Mackenzie river Tundra |
op_source |
http://www.biometeorology.umn.edu/pdf/Mackenzie_03.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.3160 http://www.biometeorology.umn.edu/pdf/Mackenzie_03.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766065819710652416 |