Surface net heat flux estimated from drifter observations
Abstract The ocean mixed layer temperature equation is used to estimate the surface net heat flux from drifter measurements. The net heat flux is determined for both the climatologic and tropical cyclone (TC) conditions. The spatial distributions of the drifter-derived heat fluxes under both the two...
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crioppubl:10.1088/1748-9326/ac8821 2024-06-02T07:56:47+00:00 Surface net heat flux estimated from drifter observations Wu, Lingwei Wang, Guihua National Natural Science Foundation of China National Key Research and Development Program of China 2022 http://dx.doi.org/10.1088/1748-9326/ac8821 https://iopscience.iop.org/article/10.1088/1748-9326/ac8821 https://iopscience.iop.org/article/10.1088/1748-9326/ac8821/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research Letters volume 17, issue 9, page 094009 ISSN 1748-9326 journal-article 2022 crioppubl https://doi.org/10.1088/1748-9326/ac8821 2024-05-07T14:04:05Z Abstract The ocean mixed layer temperature equation is used to estimate the surface net heat flux from drifter measurements. The net heat flux is determined for both the climatologic and tropical cyclone (TC) conditions. The spatial distributions of the drifter-derived heat fluxes under both the two conditions are similar to those derived from satellite observations. However, the drifter-derived climatologic heat flux appears to be weaker in magnitude than that derived from satellites, and performs better in closing the energy budget with a global mean value of 3.9 W m −2 . The drifter-derived heat flux also performs better than the satellite-derived heat flux under TCs, using the buoy observations as a reference considering metrics such as the meen error, mean absolute error, root mean-square error and percent bias. The spatially averaged mean net heat flux derived from drifters under TCs is −124 W m −2 at 10° N, and decreases to −85 W m −2 at 30° N, however, these values are much larger than those obtained from satellites (−63 W m −2 and −21 W m −2 , respectively). As additional components for the mixed layer temperature equation, both the entrainment velocity and eddy diffusivity in climatology show large amplitudes in regions with strong currents such as the Western Boundary Current and Antarctic Circumpolar Current. However, under TC conditions large values of the entrainment velocity and eddy diffusivity mostly appear in regions with strong winds. Article in Journal/Newspaper Antarc* Antarctic IOP Publishing Antarctic Environmental Research Letters 17 9 094009 |
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Abstract The ocean mixed layer temperature equation is used to estimate the surface net heat flux from drifter measurements. The net heat flux is determined for both the climatologic and tropical cyclone (TC) conditions. The spatial distributions of the drifter-derived heat fluxes under both the two conditions are similar to those derived from satellite observations. However, the drifter-derived climatologic heat flux appears to be weaker in magnitude than that derived from satellites, and performs better in closing the energy budget with a global mean value of 3.9 W m −2 . The drifter-derived heat flux also performs better than the satellite-derived heat flux under TCs, using the buoy observations as a reference considering metrics such as the meen error, mean absolute error, root mean-square error and percent bias. The spatially averaged mean net heat flux derived from drifters under TCs is −124 W m −2 at 10° N, and decreases to −85 W m −2 at 30° N, however, these values are much larger than those obtained from satellites (−63 W m −2 and −21 W m −2 , respectively). As additional components for the mixed layer temperature equation, both the entrainment velocity and eddy diffusivity in climatology show large amplitudes in regions with strong currents such as the Western Boundary Current and Antarctic Circumpolar Current. However, under TC conditions large values of the entrainment velocity and eddy diffusivity mostly appear in regions with strong winds. |
author2 |
National Natural Science Foundation of China National Key Research and Development Program of China |
format |
Article in Journal/Newspaper |
author |
Wu, Lingwei Wang, Guihua |
spellingShingle |
Wu, Lingwei Wang, Guihua Surface net heat flux estimated from drifter observations |
author_facet |
Wu, Lingwei Wang, Guihua |
author_sort |
Wu, Lingwei |
title |
Surface net heat flux estimated from drifter observations |
title_short |
Surface net heat flux estimated from drifter observations |
title_full |
Surface net heat flux estimated from drifter observations |
title_fullStr |
Surface net heat flux estimated from drifter observations |
title_full_unstemmed |
Surface net heat flux estimated from drifter observations |
title_sort |
surface net heat flux estimated from drifter observations |
publisher |
IOP Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1088/1748-9326/ac8821 https://iopscience.iop.org/article/10.1088/1748-9326/ac8821 https://iopscience.iop.org/article/10.1088/1748-9326/ac8821/pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Environmental Research Letters volume 17, issue 9, page 094009 ISSN 1748-9326 |
op_rights |
http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1748-9326/ac8821 |
container_title |
Environmental Research Letters |
container_volume |
17 |
container_issue |
9 |
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094009 |
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1800758820112171008 |