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Evaluation of OAFlux datasets based on in situ air-sea flux tower observations over Yongxing Island in 2016
Zhou, Fenghua1,2; Zhang, Rongwang1; Shi, Rui1; Chen, Ju1; He, Yunkai1; Wang, Dongxiao1; Xie, Qiang3,4
2018-11-09
Source PublicationATMOSPHERIC MEASUREMENT TECHNIQUES
ISSN1867-1381
Volume11Issue:11Pages:6091-6106
AbstractThe Yongxing air-sea flux tower (YXASFT), which was specially designed for air-sea boundary layer observations, was constructed on Yongxing Island in the South China Sea (SCS). Surface bulk variable measurements were collected during a 1-year period from 1 February 2016 to 31 January 2017. The sensible heat flux (SHF) and latent heat flux (LHF) were further derived via the Coupled Ocean-Atmosphere Response Experiment version 3.0 (COARE3.0). This study employed the YXASFT in situ observations to evaluate the Woods Hole Oceanographic Institute (WHOI) Objectively Analyzed Air-Sea Fluxes (OAFlux) reanalysis data products. First, the reliability of COARE3.0 data in the SCS was validated using direct turbulent heat flux measurements via an eddy covariance flux (ECF) system. The LHF data derived from COARE3.0 are highly consistent with the ECF with a coefficient of determination (R-2) of 0.78. Second, the overall reliabilities of the bulk OAFlux variables were diminished in the order of T-a (air temperature), U (wind speed), Q(a) (air humidity) and T-s (sea surface temperature) based on a combination of R-2 values and biases. OAFlux overestimates (underestimates) U (Q(a)) throughout the year and provides better estimates for winter and spring than in the summer-autumn period, which seems to be highly correlated with the monsoon climate in the SCS. The lowest R-2 is between the OAFlux-estimated and YXASFT-observed T-s, indicating that T-s is the least reliable dataset and should thus be used with considerable caution. In terms of the heat fluxes, OAFlux considerably overestimates LHF with an ocean heat loss bias of 52 wm(-2) in the spring, and the seasonal OAFlux LHF performance is consistent with U and Q(a). The OAFlux-estimated SHF appears to be a poor representative, with enormous overestimations in the spring and winter, while its performance is much better during the summer-autumn period. Third, analysis reveals that the biases in Q(a) are the most dominant factor on the LHF biases in the spring and winter, and that the biases in both Q(a) and U are responsible for controlling the biases in LHF during the summer-autumn period. The biases in T-s are responsible for controlling the SHF biases, and the effects of biases in T-s on the biases in SHF during the spring and winter are much greater than that in the summer-autumn period.
DOI10.5194/amt-11-6091-2018
Funding OrganizationKey Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS) ; National Natural Science Foundation of China ; Chinese Academy of Sciences (CAS) ; Station Network Construction Project, Xisha Marine Observatory of the CAS ; National Key R&D Program of China ; NOAA Climate Observations and Monitoring (COM) program
Language英语
Funding ProjectKey Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS)[QYZDJ-SSW-DQC022] ; National Natural Science Foundation of China[41706102] ; Chinese Academy of Sciences (CAS) ; Station Network Construction Project, Xisha Marine Observatory of the CAS[KZCX2-YW-Y202] ; National Key R&D Program of China[2017YFA0603200] ; NOAA Climate Observations and Monitoring (COM) program
WOS KeywordSOUTH CHINA SEA ; LATENT-HEAT FLUX ; ATMOSPHERE RESPONSE EXPERIMENT ; BULK AERODYNAMIC ALGORITHMS ; SURFACE METEOROLOGY ; EQUATORIAL PACIFIC ; TURBULENT FLUXES ; ATLANTIC-OCEAN ; MONSOON ONSET ; EXCHANGE
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000449655100003
PublisherCOPERNICUS GESELLSCHAFT MBH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/6351
Collection深海科学研究部_海洋环流观测与数值模拟研究室
Corresponding AuthorWang, Dongxiao; Xie, Qiang
Affiliation1.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510300, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
4.Qingdao Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao 266237, Peoples R China
Corresponding Author AffilicationInstitute of Deep-sea Science and Engineering,CAS
Recommended Citation
GB/T 7714
Zhou, Fenghua,Zhang, Rongwang,Shi, Rui,et al. Evaluation of OAFlux datasets based on in situ air-sea flux tower observations over Yongxing Island in 2016[J]. ATMOSPHERIC MEASUREMENT TECHNIQUES,2018,11(11):6091-6106.
APA Zhou, Fenghua.,Zhang, Rongwang.,Shi, Rui.,Chen, Ju.,He, Yunkai.,...&Xie, Qiang.(2018).Evaluation of OAFlux datasets based on in situ air-sea flux tower observations over Yongxing Island in 2016.ATMOSPHERIC MEASUREMENT TECHNIQUES,11(11),6091-6106.
MLA Zhou, Fenghua,et al."Evaluation of OAFlux datasets based on in situ air-sea flux tower observations over Yongxing Island in 2016".ATMOSPHERIC MEASUREMENT TECHNIQUES 11.11(2018):6091-6106.
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