Assessing Surface Heat Flux Products with In Situ Observations over the Australian Sector of the Southern Ocean

Bharti, Vidhi; Schulz, Eric; Fairall, Christopher W.; Blomquist, Byron W.; Huang, Yi; Protat, Alain; Siems, Steven T.; Manton, Michael J.

doi:10.1175/JTECH-D-19-0009.1

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Assessing Surface Heat Flux Products with In Situ Observations over the Australian Sector of the Southern Ocean

2019
By Bharti, Vidhi ; Schulz, Eric ; Fairall, Christopher W. ; ...
Source: Journal of Atmospheric and Oceanic Technology, 36(9), 1849-1861

[PDF-1.27 MB]

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Journal Title:

Journal Of Atmospheric And Oceanic Technology
Personal Author:

Bharti, Vidhi ; Schulz, Eric ; Fairall, Christopher W. ; Blomquist, Byron W. ; Huang, Yi ; ... More +

Bharti, Vidhi ; Schulz, Eric ; Fairall, Christopher W. ; Blomquist, Byron W. ; Huang, Yi ; Protat, Alain ; Siems, Steven T. ; Manton, Michael J. Less -
NOAA Program & Office:

CIRES (Cooperative Institute for Research in Environmental Sciences) ; OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; PSL (Physical Sciences Laboratory)

CIRES (Cooperative Institute for Research in Environmental Sciences) ; OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; PSL (Physical Sciences Laboratory) Less -
Description:

Given the large uncertainties in surface heat fluxes over the Southern Ocean, an assessment of fluxes obtained by European Centre for Medium-Range Weather Forecasts interim reanalysis (ERA-Interim) product, the Australian Integrated Marine Observing System (IMOS) routine observations, and the Objectively Analyzed Air–Sea Heat Fluxes (OAFlux) project hybrid dataset is performed. The surface fluxes are calculated using the COARE 3.5 bulk algorithm with in situ data obtained from the NOAA Physical Sciences Division flux system during the Clouds, Aerosols, Precipitation, Radiation, and Atmospheric Composition over the Southern Ocean (CAPRICORN) experiment on board the R/V Investigator during a voyage (March–April 2016) in the Australian sector of the Southern Ocean (43°–53°S). ERA-Interim and OAFlux data are further compared with the Southern Ocean Flux Station (SOFS) air–sea flux moored surface float deployed for a year (March 2015–April 2016) at ~46.7°S, 142°E. The results indicate that ERA-Interim (3 hourly at 0.25°) and OAFlux (daily at 1°) estimate sensible heat flux Hs accurately to within ±5 W m−2 and latent heat flux Hl to within ±10 W m−2. ERA-Interim gives a positive bias in Hs at low latitudes (<47°S) and in Hl at high latitudes (>47°S), and OAFlux displays consistently positive bias in Hl at all latitudes. No systematic bias with respect to wind or rain conditions was observed. Although some differences in the bulk flux algorithms are noted, these biases can be largely attributed to the uncertainties in the observations used to derive the flux products.
Keywords:

[+]

Atmosphere Ocean-atmosphere Interaction Ocean Temperature
Source:

Journal of Atmospheric and Oceanic Technology, 36(9), 1849-1861
DOI:

https://doi.org/10.1175/JTECH-D-19-0009.1
Document Type:

Journal Article
Place as Subject:

Australia
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Submitted
Main Document Checksum:

[+]

urn:sha256:5c90ffe7a354771b2bc4dcff1684c67ff797ed0efdf1876ac3fec8de8169019c
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https://repository.library.noaa.gov/view/noaa/27970/noaa_27970_DS1.pdf
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Assessing Surface Heat Flux Products with In Situ Observations over the Australian Sector of the Southern Ocean

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