{"corpus_id":127989960,"paper_sha":"a8d6afaca7b8a6be4704dfa8a8e2830bb80bbf85","doi":"10.3189/S0022143000009266","arxiv_id":null,"pmid":null,"pmcid":null,"mag_id":68670755,"dblp_id":null,"acl_id":null,"title":"Surface Roughness and Bulk Heat Transfer on a Glacier: Comparison with Eddy Correlation","year":1989,"publication_date":null,"venue":"Journal of Glaciology","journal":{"name":"Journal of Glaciology","pages":"343 - 348","volume":"35"},"journal_issn":null,"journal_title":null,"publication_types":[],"pubmed_pub_types":null,"s2_fields_of_study":["Geology","Environmental Science"],"reference_count":30,"citation_count":193,"influential_citation_count":38,"is_open_access":true,"arxiv_categories":null,"arxiv_license":null,"arxiv_journal_ref":null,"mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":1,"s2_open_access_pdf_url":"https://www.cambridge.org/core/services/aop-cambridge-core/content/view/5B2EB7DA1B423B846EC87017569F0FC4/S0022143000009266a.pdf/div-class-title-surface-roughness-and-bulk-heat-transfer-on-a-glacier-comparison-with-eddy-correlation-div.pdf","s2_open_access_landing_url":"https://www.semanticscholar.org/paper/a8d6afaca7b8a6be4704dfa8a8e2830bb80bbf85","s2_open_access_license":null,"s2_open_access_status":"BRONZE","pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"Abstract More than 100 simultaneously measured profiles of wind speed and temperature were analyzed to determine the aerodynamic and thermal roughness lengths of glacier ice. The results proved to be extremely sensitive to measurement height, which is difficult to define precisely on the hummocky terrain of a glacier. Therefore, aerodynamic roughness lengths were estimated from the microtopography of the surface, yielding 2.46 mm for ice, and 5.5 mm for snow. Despite the indeterminate nature of the profile analysis, it did support the view that the thermal roughness length must decrease as the roughness Reynolds number increases, a relationship which has been modelled in the literature. Good agreement between bulk-transfer estimates and eddy-correlation measurements of fhe sensible heat-flux density on melting ice and snow was obtained by combining the aerodynamic roughness length with a suitable model for thermal roughness length.","claims":[{"public_id":"cl_d5ab0d0d766c80e5a08fb2ee9306df22","status":"active","text":"Aerodynamic roughness lengths estimated from glacier surface microtopography are 2.46 mm for ice and 5.5 mm for snow.","confidence":0.98,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_d5ab0d0d766c80e5a08fb2ee9306df22"},{"public_id":"cl_8cabe8902d9cfa661e61e6780947197e","status":"active","text":"Combining aerodynamic roughness length with a suitable thermal roughness model yields good agreement between bulk-transfer estimates and eddy-correlation measurements of sensible heat-flux density on melting ice and snow.","confidence":0.97,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_8cabe8902d9cfa661e61e6780947197e"},{"public_id":"cl_cc326dc41daf210e2469a311e3a2262b","status":"active","text":"Profile-based estimates of aerodynamic and thermal roughness lengths are extremely sensitive to measurement height on hummocky glacier terrain.","confidence":0.95,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_cc326dc41daf210e2469a311e3a2262b"},{"public_id":"cl_163290558ab0d56b46c86da2595753ba","status":"active","text":"Thermal roughness length decreases as the roughness Reynolds number increases.","confidence":0.91,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous 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