2008), which will pop over to this web-site take vessel and buoy dimensions and produces an excellent gridded dataset in the 2° resolution playing with a maximum interpolation means. I utilize the climatological data calculated anywhere between 1981 and you may 2010. Because the a good metric to your interhemispheric difference out of warm SST, i determine ?SST once the spatially weighted SST involving the equator and you will 20°Letter with no spatially adjusted SST between the equator and 20°S. step one

(iii) Atmospheric temperatures transport over the equator

The latest atmospheric heat transport is derived from the latest Federal Centers for Environmental Prediction (NCEP) four-times-each day reanalysis industries (Kalnay mais aussi al. 1996) having a great (horizontal) spectral solution from T62 and 17 vertical levels. Brand new atmospheric temperatures transportation is computed from the basic balancing brand new atmospheric mass finances on reanalysis analysis that have a barotropic cinch modification as in Trenberth (1997) and you may next calculating the latest meridional flux out-of moist fixed opportunity 2 and you will vertically partnering. This method can be used in order to write month-to-month averaged atmospheric temperatures transportation regarding 1981 to help you 2010 as well as the climatological mediocre over this era is utilized contained in this research.

We use longwave and shortwave radiative fluxes from the Clouds and Earth’s Radiant Energy System (CERES) experiment (Wielicki et al. 1996) to calculate ?SWABS? and ?OLR?. All calculations are performed separately for each of the four CERES instruments (FM1 and FM2 on Terra from 2000 to 2005 and FM3 and FM4 on Aqua from 2002 to 2005). We then average the results over the four instruments. The quantity ?STOR_atmos? is calculated as the finite difference of the vertically integrated temperature and specific humidity from the NCEP reanalysis climatology. As in Donohoe and Battisti (2013), ?SHF? is calculated as the residual of radiative heating, atmospheric storage, and the atmospheric heat transport divergence (from NCEP reanalysis).

The seasonal amplitude and you will phase included in our very own research is actually discussed because the amplitude and you will phase of your annual harmonic.

2) Overall performance

A scatterplot of the monthly average P_Cent versus AHT_EQ and ?SST is shown in Fig. 3. The precipitation centroid varies from 5.3°S in February to 7.2°N in August and has an annual average of 1.65°N. This seasonal cycle of ITCZ location is slightly damped (equatorward) of other common metrics of ITCZ location (e.g., the latitude of maximum zonal mean precipitation, Xian and Miller 2008). It can be seen that P_Penny spends four months of the year in the Southern Hemisphere during the austral summer as the most intense precipitation is found in the South Pacific convergence zone at this time of year (not shown) and the zonal mean precipitation maximum moves to southern latitudes. We note that although the marine ITCZ defined in the eastern Pacific and Atlantic by Waliser and Gautier (1993) never moves south of the equator, the global ITCZ defined in the same study does move into the Southern Hemisphere and agrees very well with our precipitation centroid.

(top) Scatterplot of regular duration of exotic rain centroid compared to get across-equatorial atmospheric temperatures transportation. Each get across try predicated on the newest monthly average and the size of one’s cross for each axis represents the latest 95% believe interval reviewed in the interannual variability. New filled container is the annual average. The new dashed range ‘s the linear ideal match towards month-to-month averages. (bottom) Once the during the finest, but for brand new tropical precipitation centroid versus the fresh interhemispheric difference in tropical SST.

(top) Scatterplot of the regular stage away from warm rain centroid versus cross-equatorial atmospheric temperatures transportation. Per mix is based on the brand new month-to-month average and duration of one’s mix for each axis means the brand new 95% trust interval examined regarding the interannual variability. The fresh occupied box ‘s the annual mediocre. The newest dashed range is the linear ideal complement towards monthly averages. (bottom) As the at the ideal, however for this new exotic precipitation centroid against the fresh interhemispheric difference in warm SST.