New design integrations are performed for the Geophysical Water Personality Laboratory (GFDL) Atmospheric Design version 2

1) Model operates used

1 (Delworth et al. 2006) presenting a restricted-volume dynamical center (Lin 2004) with a lateral resolution around 2° latitude and twenty-four straight profile. The newest atmospheric model was paired so you can good slab sea with spatially uniform breadth. Five clothes participants that have prescribed ocean deepness of 2.cuatro, six, 12, twenty-four, and you may 50 meters is reviewed within study. The brand new design are forced by seasonally differing insolation having zero eccentricity and you will ° obliquity, which can be work at having two decades, sufficient to gather into a constant climatology. The brand new model climatology is actually extracted from the final five years away from brand new integrations.

2) Show

The seasonal migration of the ITCZ off the equator has a larger amplitude for shallower ocean depths (Fig. 8) and PPenny reaches as far as 21° in the 2.4-m slab depth run as compared to 3° in the 50-m slab depth run. This behavior is expected because the adjustment time scale of a 50-m-deep ocean to solar heating is on the order of one year (Donohoe 2011) as compared to weeks for 2.4-m-deep ocean. Thus, the SSTs barely adjust to the seasonally varying insolation in the 50-m run while the maximum SST moves seasonally with the insolation in the 2.4-m run.

(top) Seasonal listing of precipitation centroid and you may atmospheric heat transport over the equator on the slab sea aquaplanet simulations with each simulation (sea breadth) provided by a different color. The fresh new seasonal assortment are twice the brand new amplitude of annual harmonic each and every changeable plus the mountain of your own range ‘s the regression coefficient of month-to-month analysis. This new black colored asterisks would be the month-to-month observations additionally the strong black line ‘s the seasonal range of brand new findings. (bottom) Due to the fact during the top, but for precipitation centroid and you will tropical SST gradient.

(top) Seasonal set of precipitation centroid and you may atmospheric temperatures transport along the equator regarding the slab water aquaplanet simulations with every simulation (sea depth) given by a different sort of color. This new regular diversity are double brand new amplitude of the yearly harmonic of every changeable plus the hill of your line is the regression coefficient of month-to-month investigation. The fresh new black asterisks would be the monthly findings as well as the strong black range is the regular list of the fresh new observations. (bottom) Because the on best, however for rain centroid and you may exotic SST gradient.

(top) Seasonal selection of precipitation centroid and you may atmospheric temperature transportation along side equator from the slab sea aquaplanet simulations with every simulation (ocean breadth) provided by a new colour. The latest regular assortment was double the fresh amplitude of annual harmonic of every variable together with mountain of one’s line ‘s the regression coefficient of month-to-month data. The newest black asterisks will be the month-to-month findings and the strong black colored range is the regular a number of the brand new observations. (bottom) Once the at finest, however for rain centroid and you may exotic SST gradient.

The seasonal amplitude of AHTEQ also decreases with increasing ocean depth, from 11.6 PW in the 2.4-m run to 0.5 PW in the 50-m run. In the shallow ocean run, the SSTs respond rapidly to the seasonally varying insolation, heating up over the summer hemisphere and subsequently fluxing energy upward (via turbulent and longwave fluxes) to the adjacent atmosphere to drive seasonal variations in AHTEQ; in the 2.4-m run ?SHF? LGBT dating sites is nearly in phase with the insolation (11-day lag) and has a seasonal amplitude of 11.6 PW. In contrast, the solar heating of the ocean makes a minimal impact on ocean temperatures in the deep ocean runs due to the large heat capacity of the ocean. In fact, SWABS is the only source of seasonal atmospheric heating in the 50-m run and the atmosphere loses energy to the ocean during the warm season; in the 50-m run ?SHF? is nearly antiphased with the insolation (192-day lag) and has a seasonal amplitude of 3.7 PW.