Data_Sheet_1_Advances in the Estimation of Global Surface Net Heat Flux Based on Satellite Observation: J-OFURO3 V1.1.XLSX
The reliability of surface net heat flux data obtained from the latest satellite-based estimation [the third-generation Japanese Ocean Flux Data Sets with Use of Remote Sensing Observations (J-OFURO3, V1.1)] was investigated. Three metrics were utilized: (1) the global long-term (30 years) mean for...
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ftsmithonian:oai:figshare.com:article/13721650 2023-05-15T18:18:22+02:00 Data_Sheet_1_Advances in the Estimation of Global Surface Net Heat Flux Based on Satellite Observation: J-OFURO3 V1.1.XLSX Hiroyuki Tomita (3121689) Kunio Kutsuwada (1388613) Masahisa Kubota (10104262) Tsutomu Hihara (10104265) 2021-02-05T16:27:43Z https://doi.org/10.3389/fmars.2021.612361.s001 unknown https://figshare.com/articles/dataset/Data_Sheet_1_Advances_in_the_Estimation_of_Global_Surface_Net_Heat_Flux_Based_on_Satellite_Observation_J-OFURO3_V1_1_XLSX/13721650 doi:10.3389/fmars.2021.612361.s001 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering air-sea interaction air-sea heat flux satellite-remote sensing J-OFURO buoy Dataset 2021 ftsmithonian https://doi.org/10.3389/fmars.2021.612361.s001 2021-02-26T12:07:04Z The reliability of surface net heat flux data obtained from the latest satellite-based estimation [the third-generation Japanese Ocean Flux Data Sets with Use of Remote Sensing Observations (J-OFURO3, V1.1)] was investigated. Three metrics were utilized: (1) the global long-term (30 years) mean for 1988–2017, (2) the local accuracy evaluation based on comparison with observations recorded at buoys located at 11 global oceanic points with varying climatological characteristics, and (3) the physical consistency with the freshwater balance related to the global water cycle. The globally averaged value of the surface net heat flux of J-OFURO3 was −22.2 W m −2 , which is largely imbalanced to heat the ocean surface. This imbalance was due to the turbulent heat flux being smaller than the net downward surface radiation. On the other hand, compared with the local buoy observations, the average difference was −5.8 W m −2 , indicating good agreement. These results indicate a paradox of the global surface net heat flux. In relation to the global water cycle, the balance between surface latent heat flux (ocean evaporation) and precipitation was estimated to be almost 0 when river runoff from the land was taken into consideration. The reliability of the estimation of the latent heat flux was reconciled by two different methods. Systematic ocean-heating biases by surface sensible heat flux (SHF) and long wave radiation were identified. The bias in the SHF was globally persistent and especially large in the mid- and high latitudes. The correction of the bias has an impact on improving the global mean net heat flux by +5.5 W m −2 . Furthermore, since J-OFURO3 SHF has low data coverage in high-latitudes areas containing sea ice, its impact on global net heat flux was assessed using the latest atmospheric reanalysis product. When including the sea ice region, the globally averaged value of SHF was approximately 1.4 times larger. In addition to the bias correction mentioned above, when assuming that the global ocean average of J3 SHF is 1.4 times larger, the net heat flux value changes to the improved value (−11.3 W m −2 ), which is approximately half the original value (−22.2 W m −2 ). Dataset Sea ice Unknown |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftsmithonian |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering air-sea interaction air-sea heat flux satellite-remote sensing J-OFURO buoy |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering air-sea interaction air-sea heat flux satellite-remote sensing J-OFURO buoy Hiroyuki Tomita (3121689) Kunio Kutsuwada (1388613) Masahisa Kubota (10104262) Tsutomu Hihara (10104265) Data_Sheet_1_Advances in the Estimation of Global Surface Net Heat Flux Based on Satellite Observation: J-OFURO3 V1.1.XLSX |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering air-sea interaction air-sea heat flux satellite-remote sensing J-OFURO buoy |
description |
The reliability of surface net heat flux data obtained from the latest satellite-based estimation [the third-generation Japanese Ocean Flux Data Sets with Use of Remote Sensing Observations (J-OFURO3, V1.1)] was investigated. Three metrics were utilized: (1) the global long-term (30 years) mean for 1988–2017, (2) the local accuracy evaluation based on comparison with observations recorded at buoys located at 11 global oceanic points with varying climatological characteristics, and (3) the physical consistency with the freshwater balance related to the global water cycle. The globally averaged value of the surface net heat flux of J-OFURO3 was −22.2 W m −2 , which is largely imbalanced to heat the ocean surface. This imbalance was due to the turbulent heat flux being smaller than the net downward surface radiation. On the other hand, compared with the local buoy observations, the average difference was −5.8 W m −2 , indicating good agreement. These results indicate a paradox of the global surface net heat flux. In relation to the global water cycle, the balance between surface latent heat flux (ocean evaporation) and precipitation was estimated to be almost 0 when river runoff from the land was taken into consideration. The reliability of the estimation of the latent heat flux was reconciled by two different methods. Systematic ocean-heating biases by surface sensible heat flux (SHF) and long wave radiation were identified. The bias in the SHF was globally persistent and especially large in the mid- and high latitudes. The correction of the bias has an impact on improving the global mean net heat flux by +5.5 W m −2 . Furthermore, since J-OFURO3 SHF has low data coverage in high-latitudes areas containing sea ice, its impact on global net heat flux was assessed using the latest atmospheric reanalysis product. When including the sea ice region, the globally averaged value of SHF was approximately 1.4 times larger. In addition to the bias correction mentioned above, when assuming that the global ocean average of J3 SHF is 1.4 times larger, the net heat flux value changes to the improved value (−11.3 W m −2 ), which is approximately half the original value (−22.2 W m −2 ). |
format |
Dataset |
author |
Hiroyuki Tomita (3121689) Kunio Kutsuwada (1388613) Masahisa Kubota (10104262) Tsutomu Hihara (10104265) |
author_facet |
Hiroyuki Tomita (3121689) Kunio Kutsuwada (1388613) Masahisa Kubota (10104262) Tsutomu Hihara (10104265) |
author_sort |
Hiroyuki Tomita (3121689) |
title |
Data_Sheet_1_Advances in the Estimation of Global Surface Net Heat Flux Based on Satellite Observation: J-OFURO3 V1.1.XLSX |
title_short |
Data_Sheet_1_Advances in the Estimation of Global Surface Net Heat Flux Based on Satellite Observation: J-OFURO3 V1.1.XLSX |
title_full |
Data_Sheet_1_Advances in the Estimation of Global Surface Net Heat Flux Based on Satellite Observation: J-OFURO3 V1.1.XLSX |
title_fullStr |
Data_Sheet_1_Advances in the Estimation of Global Surface Net Heat Flux Based on Satellite Observation: J-OFURO3 V1.1.XLSX |
title_full_unstemmed |
Data_Sheet_1_Advances in the Estimation of Global Surface Net Heat Flux Based on Satellite Observation: J-OFURO3 V1.1.XLSX |
title_sort |
data_sheet_1_advances in the estimation of global surface net heat flux based on satellite observation: j-ofuro3 v1.1.xlsx |
publishDate |
2021 |
url |
https://doi.org/10.3389/fmars.2021.612361.s001 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
https://figshare.com/articles/dataset/Data_Sheet_1_Advances_in_the_Estimation_of_Global_Surface_Net_Heat_Flux_Based_on_Satellite_Observation_J-OFURO3_V1_1_XLSX/13721650 doi:10.3389/fmars.2021.612361.s001 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2021.612361.s001 |
_version_ |
1766194914030256128 |