Sentences with phrase «downward shortwave»
Now, here's Figure 4 from Pavlakis et al (2008) that shows downward shortwave radiation over the central equatorial Pacific varying inversely with NINO3.4 sea surface temperature anomalies: Link to Pavlakis et al: http://www.atmos-chem-phys-discuss.net/8/6697/2008/acpd-8-6697-2008-print.pdf
https://wattsupwiththat.com/
That is, trade winds increase during a La Nina, decreasing cloud cover over the tropical Pacific, increasing Downward Shortwave Radiation, increasing Pacific Equatorial Current flow.
Using 13 yr of satellite observations for the Tibetan Plateau, the sensitivities (or partial derivatives) of daytime surface downward shortwave and longwave fluxes with respect to changes in cloud cover and cloud optical thickness are investigated and quantified.
There are significant differences between the impacts of Downward Longwave Radiation and Downward Shortwave Radiation.
The downward shortwave flux is found to be modulated primarily by changes in cloud cover, but changes in optical thickness also have an impact, as revealed by a multiple regression fit.
It has to warm if the net radiation there increases by 3.7 W / m2, whether it is an increase in downward shortwave, or an increase in upward longwave.
Answer, downward shortwave radiation, according to two Trenberth papers.
ENSO also regulates heat gain to the tropical Pacific through variations in cloud amount and the resulting downward shortwave radiation entering the tropical Pacific.
Over the central and eastern tropical Pacific, cloud cover increases and downward shortwave radiation decreases during an El Nino.
That is, a decrease in cloud cover yields an increase in downward shortwave radiation.
The La Nina that follows the El Nino returns part of the leftover warm water to the Pacific Warm Pool for the next El Nino, redistributes the rest of the warm water to nearby oceans, and recharges the heat released by the El Nino through increases in downward shortwave radiation.
And the variations in downward shortwave radiation oppose the variations in cloud cover.
If you were saying that the central and eastern tropical Pacific SST anomalies warm during an El Nino event because of an increase in downward shortwave radiation, you are wrong, John.
tasmax — Maximum daily temperature near surface tasmin — Minimum daily temperature near surface rhsmax — Maximum daily relative humidity near surface rhsmin — Minimum daily relative humdity near surface huss — Average daily specific humidity near surface pr — Average daily precipitation amount at surface rsds - Average daily downward shortwave radiation at surface was — Average daily wind speed near surface uas — Average daily eastward component of wind near surface vas — Average daily northward component of wind near surface
Those numerous posts document, illustrate and discuss how ENSO causes variations in atmospheric circulation, ocean currents, Downward Shortwave Radiation, cloud cover, precipitation, trade wind strength in the Pacific and Atlantic, etc..
Any temperature rise that would occur due the slowing of the Northern and Southern Pacific equatorial currents («gets heated day after day by the equatorial Sun») would be countered by the increase in cloud amount, which would reduce downward shortwave radiation.
The Pavlakis et al (2008) paper «ENSO Surface Shortwave Radiation Forcing over the Tropical Pacific» identifies the variations in surface downward shortwave radiation over portions of the Pacific Oceans caused by El Nino - produced cloud cover changes.
The recharging takes place during La Nina events when stronger trade winds decrease cloud cover and allow more downward shortwave radiation to warm the tropical Pacific.
I've presented videos and gif animations to show the impacts of ENSO on ISCCP Total Cloud Amount data (with cautions about that dataset), CAMS - OPI precipitation data, NOAA's Trade Wind Index (5S - 5N, 135W - 180) anomaly data, RSS MSU TLT anomaly data, CLS (AVISO) Sea Level anomaly data, NCEP / DOE Reanalysis - 2 Surface Downward Shortwave Radiation Flux (dswrfsfc) anomaly data, Reynolds OI.v2 SST anomaly data and the NODC's ocean heat content data.
The stronger - than - normal trade winds in the western tropical Pacific associated with that La Nina reduced cloud cover, allowing more downward shortwave radiation to enter and warm the Western Tropical Pacific.
where SW denotes net downward shortwave radiation, LW net upward longwave radiation, LH latent heat flux, and SH sensible heat flux I can find these products at http://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.surfaceflux.html Regarding the latent and sensible fluxes I don't have a problem (since there are only two in the NCEP list), but regarding the others I have several.
Not exact matches
According to someone in our group who looked at your question «I think they should use the net shortwave and net longwave (if there are also upward and downward fluxes).
[1] Total absorbed radiation (TAR), the sum of SNR [shortwave net radiation] and LDR [longwave downward radiation], represents the total radiative energy available to maintain the Earth's surface temperature and to sustain the turbulent (sensible and latent) heat fluxes in the atmosphere.