2008), that takes boat and you will buoy specifications and provides a gridded dataset in the 2° resolution playing with an optimum interpolation means. I make use of the climatological data determined between 1981 and you may 2010. Just like the a metric into the interhemispheric differences away from warm SST, i estimate ?SST once the spatially adjusted SST amongst the equator and you can 20°Letter without spatially adjusted SST involving the equator and you may 20°S. step one

(iii) Atmospheric heat transport along side equator

The fresh new atmospheric temperatures transport comes from the Federal Facilities to own Ecological Forecast (NCEP) four-times-each and every day reanalysis areas (Kalnay et al. 1996) which have good (horizontal) spectral quality regarding T62 and you can 17 straight levels. New atmospheric temperatures transport are calculated from the basic balancing brand new atmospheric size finances regarding reanalysis studies with a barotropic breeze modification like in Trenberth (1997) and you may next calculating new meridional flux out of damp fixed opportunity dos and you may vertically integrating. This technique is employed to help you write month-to-month averaged atmospheric temperature transport out-of 1981 so you can 2010 plus the climatological mediocre over this period can be used in this data.

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 fresh regular amplitude and you may stage utilized in the data are laid out since the amplitude and phase of yearly harmonic.

2) Abilities

A scatterplot of the monthly average P_Penny 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 best hookup apps gay 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 the seasonal course regarding exotic rain centroid compared to get across-equatorial atmospheric temperature transport. Per cross try considering the brand new monthly average while the duration of the get across for each axis is short for the 95% count on interval reviewed in the interannual variability. The fresh filled box is the yearly average. The latest dashed line ‘s the linear best complement for the monthly averages. (bottom) Since the in the top, however for the fresh exotic rain centroid against the fresh interhemispheric difference in tropical SST.

(top) Scatterplot of one’s regular years out-of tropical precipitation centroid against cross-equatorial atmospheric temperature transportation. For every get across try based on the fresh month-to-month mediocre in addition to length of your own mix for each axis is short for the fresh 95% confidence period reviewed regarding interannual variability. The filled container ‘s the yearly average. The newest dashed line ‘s the linear ideal match on monthly averages. (bottom) Due to the fact on better, but for the tropical precipitation centroid versus new interhemispheric difference between warm SST.