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The ageostrophic method—an update
OLR(1987)34 (12)
1031
B. MARINE METEOROLOGY B I0. Apparatus and methods
BI40. Air-sea interactions
87:6760 Ramage, C.S., 1987. Secular change ha reported surface wind speeds over the ocean. J. Climate appl. Met., 26(4):525-528.
87:6764 Atlas, R., A.J. Busalacchi, M. Ghil, S. Bloom and E. Kalnay, 1987. Global surface wind and flux fields from model assimilation of Seasat data. J. geophys. Res, 92(C6):6477-6487.
The Comprehensive Ocean-Atmosphere Data Set reveals that mean scalar winds decreased between 1854 and 1920 and increased since World War II. The increase is due to a change in estimating procedure and the growing proportion of ships equipped with anemometers. The sign of the earlier decrease is attributed to the transition from sail to steam; a true secular trend cannot be isolated. Dept. of Meteorol., Univ. of Hawaii, Honolulu, HI, USA. 87:6761 Schmitz-Peiffer, A., D. Heinemann and L. Hasse, 1987. The ageostrophic method---an update. Boundary-layer Met, 39(3):269-281. Inst. fur Phys. der Atmos., DFVLR, Oberpfaffenhofen, FRG.
B50. Common
atmospheric properties
(temperature, humidity, etc.) 87:6762 Francey, R.J. and P.P. Tans, 1987. Latitudinal variation in oxygen-18 of atmospheric CO s. Nature, Lond., 327(6122):495-497. CSIRO Div. of Atmos. Res., Aspendale, Vic. 3195, Australia.
BII0. Climate, climatology 87:6763 Gleick, P.H., 1987. Regional hydrologic consequences of increases in atmospheric CO s and other trace gases. Clim. Change, 10(2):137-161.
Water-balance modeling is applied to a northern California watershed using GCM and hypothetical climate changes. Results show plausible increases in atmospheric trace gas levels could alter significantly the timing and extent of runoff and soil moisture, with summer decreases in the latter of 8-44%. Energy and Resour. Group, Univ. of Calif., Berkeley 94720, USA. (jrb)
The 96-day period of Seasat scatterometer data has been objectively dealiased using the Goddard Laboratory for Atmospheres (GLA) analysis/forecast system, with global fields of wind stress, and sensible and latent heat fluxes produced as a by-product. The GLA objectively dealiased winds were compared with a subjectively dealiased data set and objectively dealiased winds obtained by an alternative method. Good agreement between the three methods was found. Monthly mean analyses of wind stress and latent heat flux agreed well with climatological fields and atmospheric and oceanic features. Monthly mean sensible heat flux fields differed substantially from climatology, but in a few subjective comparisons with observed atmospheric features instantaneous fields were reasonable. Lab. for Atmos., NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA. 87:6765 Bradley, R.S., H.F. Diaz, G.N. Kiladis and J.K. Eischeid, 1987. ENSO signal ha continental temperature and precipitathm records. Nature, Lond, 327(6122):497-501.
Warm events in the tropical Pacific Ocean are now known to be of global significance in perturbing the general circulation of the atmosphere. Episodes of enhanced cold-water upwelling ('cold events') also have an impact on large-scale atmospheric circulation patterns. The effect of warm and cold events on short-term fluctuations of continental surface air temperature and precipitation throughout the Northern Hemisphere is examined using a newly compiled set of high-quality temperature and precipitation data. The data were in the form of gridded anomalies from a 1951-70 reference mean for temperature and a 1921-60 reference mean for precipitation. Univ. of Massachusetts, Amherst, MA 01003, USA. 87:6766 Brutsaert, Wilfried, 1987. Nearly steady convection and the boundary-layer budgets of water vapor and sensible heat. Boundary-layer Met, 39(3): 283-300.
1031
B. MARINE METEOROLOGY B I0. Apparatus and methods
BI40. Air-sea interactions
87:6760 Ramage, C.S., 1987. Secular change ha reported surface wind speeds over the ocean. J. Climate appl. Met., 26(4):525-528.
87:6764 Atlas, R., A.J. Busalacchi, M. Ghil, S. Bloom and E. Kalnay, 1987. Global surface wind and flux fields from model assimilation of Seasat data. J. geophys. Res, 92(C6):6477-6487.
The Comprehensive Ocean-Atmosphere Data Set reveals that mean scalar winds decreased between 1854 and 1920 and increased since World War II. The increase is due to a change in estimating procedure and the growing proportion of ships equipped with anemometers. The sign of the earlier decrease is attributed to the transition from sail to steam; a true secular trend cannot be isolated. Dept. of Meteorol., Univ. of Hawaii, Honolulu, HI, USA. 87:6761 Schmitz-Peiffer, A., D. Heinemann and L. Hasse, 1987. The ageostrophic method---an update. Boundary-layer Met, 39(3):269-281. Inst. fur Phys. der Atmos., DFVLR, Oberpfaffenhofen, FRG.
B50. Common
atmospheric properties
(temperature, humidity, etc.) 87:6762 Francey, R.J. and P.P. Tans, 1987. Latitudinal variation in oxygen-18 of atmospheric CO s. Nature, Lond., 327(6122):495-497. CSIRO Div. of Atmos. Res., Aspendale, Vic. 3195, Australia.
BII0. Climate, climatology 87:6763 Gleick, P.H., 1987. Regional hydrologic consequences of increases in atmospheric CO s and other trace gases. Clim. Change, 10(2):137-161.
Water-balance modeling is applied to a northern California watershed using GCM and hypothetical climate changes. Results show plausible increases in atmospheric trace gas levels could alter significantly the timing and extent of runoff and soil moisture, with summer decreases in the latter of 8-44%. Energy and Resour. Group, Univ. of Calif., Berkeley 94720, USA. (jrb)
The 96-day period of Seasat scatterometer data has been objectively dealiased using the Goddard Laboratory for Atmospheres (GLA) analysis/forecast system, with global fields of wind stress, and sensible and latent heat fluxes produced as a by-product. The GLA objectively dealiased winds were compared with a subjectively dealiased data set and objectively dealiased winds obtained by an alternative method. Good agreement between the three methods was found. Monthly mean analyses of wind stress and latent heat flux agreed well with climatological fields and atmospheric and oceanic features. Monthly mean sensible heat flux fields differed substantially from climatology, but in a few subjective comparisons with observed atmospheric features instantaneous fields were reasonable. Lab. for Atmos., NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA. 87:6765 Bradley, R.S., H.F. Diaz, G.N. Kiladis and J.K. Eischeid, 1987. ENSO signal ha continental temperature and precipitathm records. Nature, Lond, 327(6122):497-501.
Warm events in the tropical Pacific Ocean are now known to be of global significance in perturbing the general circulation of the atmosphere. Episodes of enhanced cold-water upwelling ('cold events') also have an impact on large-scale atmospheric circulation patterns. The effect of warm and cold events on short-term fluctuations of continental surface air temperature and precipitation throughout the Northern Hemisphere is examined using a newly compiled set of high-quality temperature and precipitation data. The data were in the form of gridded anomalies from a 1951-70 reference mean for temperature and a 1921-60 reference mean for precipitation. Univ. of Massachusetts, Amherst, MA 01003, USA. 87:6766 Brutsaert, Wilfried, 1987. Nearly steady convection and the boundary-layer budgets of water vapor and sensible heat. Boundary-layer Met, 39(3): 283-300.