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Modelling Surface-Air-Temperature Variation Over Complex Terrain Around Abisko, Swedish Lapland: Uncertainties Of Measurements And Models At Different Scales

Yang, Zhenlin LU ; Hanna, Edward and Callaghan, Terry V. (2011) In Geografiska Annaler. Series A. Physical Geography 93A(2). p.89-112
Abstract
P>Many ecological, physical and geographical processes affected by climate in the natural environment are scale-dependent: determining surface-air-temperature distribution at a scale of tens to hundreds of metres can facilitate such research, which is currently hampered by the relative dearth of meteorological stations and complex surface temperature characteristics, particularly in mountain areas. Here we discuss both the couplings and mismatch of present climatological data at different scales, ranging from similar to 50 m to 100 km, and provide a novel model of the surface-air-temperature distribution in topographically heterogeneous regions. First, a comparison of the large-scale weather station measurements and gridded climate... (More)
P>Many ecological, physical and geographical processes affected by climate in the natural environment are scale-dependent: determining surface-air-temperature distribution at a scale of tens to hundreds of metres can facilitate such research, which is currently hampered by the relative dearth of meteorological stations and complex surface temperature characteristics, particularly in mountain areas. Here we discuss both the couplings and mismatch of present climatological data at different scales, ranging from similar to 50 m to 100 km, and provide a novel model of the surface-air-temperature distribution in topographically heterogeneous regions. First, a comparison of the large-scale weather station measurements and gridded climate reanalysis (ERA-40) data is used to define regional climatology in the Swedish sub-Arctic and obtain the mesoscale temperature lapse rates. Second, combined with temperature measurements obtained from transects set among complex terrain, key microclimatic characteristics of the temperature distribution are identified, showing few temperature inversions when the wind speed exceeds 3 m s-1, while temperature inversions prevail during calm nights. Besides wind, there is a pronounced winter temperature stratification around the large Lake Tornetrask, and variations in topography are found to have a strong influence in shaping the microscale temperature pattern through their effect on solar radiation during summer. A monthly 50-m scale temperature-distribution (topoclimate) model is built based on the above findings, and model validation is conducted using further fieldwork measurements from different seasons. We present results of surface-air-temperature distribution for the Abisko region, and discuss how these results help reconcile the scale mismatch mentioned above. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
lake, Lapland, modelling, solar radiation, temperature, topoclimate
in
Geografiska Annaler. Series A. Physical Geography
volume
93A
issue
2
pages
89 - 112
publisher
Wiley-Blackwell
external identifiers
  • wos:000291043100004
  • scopus:79957605737
ISSN
0435-3676
DOI
10.1111/j.1468-0459.2011.00005.x
project
BECC
language
English
LU publication?
yes
id
99282176-2242-4b99-9193-973f62e757fd (old id 1985995)
date added to LUP
2011-07-05 09:21:55
date last changed
2017-08-20 03:18:39
@article{99282176-2242-4b99-9193-973f62e757fd,
  abstract     = {P>Many ecological, physical and geographical processes affected by climate in the natural environment are scale-dependent: determining surface-air-temperature distribution at a scale of tens to hundreds of metres can facilitate such research, which is currently hampered by the relative dearth of meteorological stations and complex surface temperature characteristics, particularly in mountain areas. Here we discuss both the couplings and mismatch of present climatological data at different scales, ranging from similar to 50 m to 100 km, and provide a novel model of the surface-air-temperature distribution in topographically heterogeneous regions. First, a comparison of the large-scale weather station measurements and gridded climate reanalysis (ERA-40) data is used to define regional climatology in the Swedish sub-Arctic and obtain the mesoscale temperature lapse rates. Second, combined with temperature measurements obtained from transects set among complex terrain, key microclimatic characteristics of the temperature distribution are identified, showing few temperature inversions when the wind speed exceeds 3 m s-1, while temperature inversions prevail during calm nights. Besides wind, there is a pronounced winter temperature stratification around the large Lake Tornetrask, and variations in topography are found to have a strong influence in shaping the microscale temperature pattern through their effect on solar radiation during summer. A monthly 50-m scale temperature-distribution (topoclimate) model is built based on the above findings, and model validation is conducted using further fieldwork measurements from different seasons. We present results of surface-air-temperature distribution for the Abisko region, and discuss how these results help reconcile the scale mismatch mentioned above.},
  author       = {Yang, Zhenlin and Hanna, Edward and Callaghan, Terry V.},
  issn         = {0435-3676},
  keyword      = {lake,Lapland,modelling,solar radiation,temperature,topoclimate},
  language     = {eng},
  number       = {2},
  pages        = {89--112},
  publisher    = {Wiley-Blackwell},
  series       = {Geografiska Annaler. Series A. Physical Geography},
  title        = {Modelling Surface-Air-Temperature Variation Over Complex Terrain Around Abisko, Swedish Lapland: Uncertainties Of Measurements And Models At Different Scales},
  url          = {http://dx.doi.org/10.1111/j.1468-0459.2011.00005.x},
  volume       = {93A},
  year         = {2011},
}