On the regulation of minimum mid-tropospheric temperatures in the Arctic

M. Tsukernik, T. N. Chase, M. C. Serreze, R. G. Barry, R. Pielke, B. Herman, Xubin Zeng

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Observations indicate a minimum mid-tropospheric Arctic winter temperature of about -45°C at 500 hPa. This minimum temperature coincides with that predicted for moist adiabatic ascent over a sea surface near its salinity-adjusted freezing point. NCAR/NCEP Reanalysis data show that convective heating maxima averaged over the 50-70°N latitude band coincide both in longitude and altitude with total horizontal energy flux maxima entering the Arctic, indicating the significance of convection over open water on the winter Arctic energy budget. NCAR CCM single column model experiments simulating convective warming of a cold airmass moving over open water and radiative cooling as it moves again over cold land/sea ice support the hypothesis that the -45°C threshold can be maintained for 10-14 days after convective warming occurs. We speculate on the implications of this regulatory mechanism on surface temperatures.

Original languageEnglish (US)
JournalGeophysical Research Letters
Volume31
Issue number6
StatePublished - Mar 28 2004

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open water
warming
winter
heating
energy budget
energy flux
land ice
freezing
sea ice
sea surface
energy budgets
surface temperature
liquid cooling
ascent
temperature
convection
longitude
salinity
cooling
melting points

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Tsukernik, M., Chase, T. N., Serreze, M. C., Barry, R. G., Pielke, R., Herman, B., & Zeng, X. (2004). On the regulation of minimum mid-tropospheric temperatures in the Arctic. Geophysical Research Letters, 31(6).

On the regulation of minimum mid-tropospheric temperatures in the Arctic. / Tsukernik, M.; Chase, T. N.; Serreze, M. C.; Barry, R. G.; Pielke, R.; Herman, B.; Zeng, Xubin.

In: Geophysical Research Letters, Vol. 31, No. 6, 28.03.2004.

Research output: Contribution to journalArticle

Tsukernik, M, Chase, TN, Serreze, MC, Barry, RG, Pielke, R, Herman, B & Zeng, X 2004, 'On the regulation of minimum mid-tropospheric temperatures in the Arctic', Geophysical Research Letters, vol. 31, no. 6.
Tsukernik M, Chase TN, Serreze MC, Barry RG, Pielke R, Herman B et al. On the regulation of minimum mid-tropospheric temperatures in the Arctic. Geophysical Research Letters. 2004 Mar 28;31(6).
Tsukernik, M. ; Chase, T. N. ; Serreze, M. C. ; Barry, R. G. ; Pielke, R. ; Herman, B. ; Zeng, Xubin. / On the regulation of minimum mid-tropospheric temperatures in the Arctic. In: Geophysical Research Letters. 2004 ; Vol. 31, No. 6.
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