Improved processing methods for eddy covariance measurements in calculating sensible heat fluxes at glacier surfaces
Bulk aerodynamic methods have been shown to perform poorly in computing turbulent heat fluxes at glacier surfaces during shallow katabatic winds. Katabatic surface layers have different wind shear and flux profiles to the surface layers for which the bulk methods were developed, potentially invalida...
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ftdoajarticles:oai:doaj.org/article:e2bbddedd2344a07a408ebf58b2794ad 2024-09-15T18:08:01+00:00 Improved processing methods for eddy covariance measurements in calculating sensible heat fluxes at glacier surfaces Cole Lord-May Valentina Radić https://doi.org/10.1017/jog.2024.39 https://doaj.org/article/e2bbddedd2344a07a408ebf58b2794ad EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S002214302400039X/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2024.39 0022-1430 1727-5652 https://doaj.org/article/e2bbddedd2344a07a408ebf58b2794ad Journal of Glaciology, Pp 1-18 Energy balance glacier meteorology ice/atmosphere interactions mountain glaciers Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article ftdoajarticles https://doi.org/10.1017/jog.2024.39 2024-08-05T17:49:18Z Bulk aerodynamic methods have been shown to perform poorly in computing turbulent heat fluxes at glacier surfaces during shallow katabatic winds. Katabatic surface layers have different wind shear and flux profiles to the surface layers for which the bulk methods were developed, potentially invalidating their use in these conditions. In addition, eddy covariance-derived turbulent heat fluxes are unlikely to be representative of surface conditions when eddy covariance data are collected close to the wind speed maximum (WSM). Here we utilize two months of eddy covariance and meteorological data measured at three different heights (1 m, 2 m, and 3 m) at Kaskawulsh Glacier in the Yukon, Canada, to re-examine the performance of bulk methods relative to eddy covariance-derived fluxes under different near-surface flow regimes. We propose a new set of processing methods for one-level eddy covariance data to ensure the validity of calculated fluxes during highly variable flows and low-level wind speed maxima, which leads to improved agreement between eddy covariance-derived and modelled fluxes across all flow regimes, with the best agreement (correlation >0.9) 1 m above the surface. Contrary to previous studies, these results show that adequately processed eddy covariance data collected at or above the WSM can provide valid estimates of surface heat fluxes. Article in Journal/Newspaper glacier* Journal of Glaciology Yukon Directory of Open Access Journals: DOAJ Articles Journal of Glaciology 1 18 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Energy balance glacier meteorology ice/atmosphere interactions mountain glaciers Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Energy balance glacier meteorology ice/atmosphere interactions mountain glaciers Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Cole Lord-May Valentina Radić Improved processing methods for eddy covariance measurements in calculating sensible heat fluxes at glacier surfaces |
topic_facet |
Energy balance glacier meteorology ice/atmosphere interactions mountain glaciers Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Bulk aerodynamic methods have been shown to perform poorly in computing turbulent heat fluxes at glacier surfaces during shallow katabatic winds. Katabatic surface layers have different wind shear and flux profiles to the surface layers for which the bulk methods were developed, potentially invalidating their use in these conditions. In addition, eddy covariance-derived turbulent heat fluxes are unlikely to be representative of surface conditions when eddy covariance data are collected close to the wind speed maximum (WSM). Here we utilize two months of eddy covariance and meteorological data measured at three different heights (1 m, 2 m, and 3 m) at Kaskawulsh Glacier in the Yukon, Canada, to re-examine the performance of bulk methods relative to eddy covariance-derived fluxes under different near-surface flow regimes. We propose a new set of processing methods for one-level eddy covariance data to ensure the validity of calculated fluxes during highly variable flows and low-level wind speed maxima, which leads to improved agreement between eddy covariance-derived and modelled fluxes across all flow regimes, with the best agreement (correlation >0.9) 1 m above the surface. Contrary to previous studies, these results show that adequately processed eddy covariance data collected at or above the WSM can provide valid estimates of surface heat fluxes. |
format |
Article in Journal/Newspaper |
author |
Cole Lord-May Valentina Radić |
author_facet |
Cole Lord-May Valentina Radić |
author_sort |
Cole Lord-May |
title |
Improved processing methods for eddy covariance measurements in calculating sensible heat fluxes at glacier surfaces |
title_short |
Improved processing methods for eddy covariance measurements in calculating sensible heat fluxes at glacier surfaces |
title_full |
Improved processing methods for eddy covariance measurements in calculating sensible heat fluxes at glacier surfaces |
title_fullStr |
Improved processing methods for eddy covariance measurements in calculating sensible heat fluxes at glacier surfaces |
title_full_unstemmed |
Improved processing methods for eddy covariance measurements in calculating sensible heat fluxes at glacier surfaces |
title_sort |
improved processing methods for eddy covariance measurements in calculating sensible heat fluxes at glacier surfaces |
publisher |
Cambridge University Press |
url |
https://doi.org/10.1017/jog.2024.39 https://doaj.org/article/e2bbddedd2344a07a408ebf58b2794ad |
genre |
glacier* Journal of Glaciology Yukon |
genre_facet |
glacier* Journal of Glaciology Yukon |
op_source |
Journal of Glaciology, Pp 1-18 |
op_relation |
https://www.cambridge.org/core/product/identifier/S002214302400039X/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2024.39 0022-1430 1727-5652 https://doaj.org/article/e2bbddedd2344a07a408ebf58b2794ad |
op_doi |
https://doi.org/10.1017/jog.2024.39 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
18 |
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1810445363464634368 |