The fresh new model integrations are carried out to your Geophysical Fluid Character Research (GFDL) Atmospheric Model adaptation dos

The fresh new model integrations are carried out to your Geophysical Fluid Character Research (GFDL) Atmospheric Model adaptation dos

1) Model operates made use of

step one (Delworth ainsi que al. 2006) offering a small-regularity dynamical key (Lin 2004) with a lateral quality of about dos° latitude and you may twenty-four vertical accounts. The newest atmospheric design is actually combined so you can a good slab sea that have spatially uniform depth. Five dress professionals having recommended water deepness out-of 2.4, six, twelve, twenty four, and you will 50 meters is actually examined in this investigation. This new design is pressed by seasonally different insolation having zero eccentricity and you may ° obliquity, and that’s manage having 20 years, adequate to converge to your a stable climatology. The fresh design climatology is actually obtained from the final five years out of new integrations.

2) Results

The seasonal migration of the ITCZ off the equator has a larger amplitude for shallower ocean depths (Fig. 8) and PCent reaches as far as 21° in the 2.4-m slab Spanking Sites dating apps for iphone 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 range of precipitation centroid and atmospheric heat transport along the equator about slab sea aquaplanet simulations with every simulation (water depth) provided by a unique colour. The seasonal range try twice the new amplitude of the yearly harmonic of every adjustable in addition to mountain of line is the regression coefficient of monthly data. This new black asterisks could be the month-to-month findings and the solid black colored range is the regular set of this new observations. (bottom) Just like the from the finest, but for precipitation centroid and exotic SST gradient.

(top) Regular listing of precipitation centroid and atmospheric temperature transport across the equator about slab sea aquaplanet simulations with every simulation (water breadth) supplied by a new color. The new seasonal range try twice the latest amplitude of yearly harmonic of any changeable while the mountain of the range is the regression coefficient of your own monthly analysis. New black asterisks may be the monthly findings and the strong black colored line is the regular range of this new findings. (bottom) Due to the fact during the finest, but for precipitation centroid and you may warm SST gradient.

(top) Seasonal directory of rain centroid and you can atmospheric heat transportation across the equator regarding the slab water aquaplanet simulations with every simulator (sea depth) given by another color. Brand new seasonal range are double the fresh new amplitude of yearly harmonic each and every varying while the hill of your line is the regression coefficient of the month-to-month analysis. The newest black colored asterisks are the monthly observations additionally the solid black line ‘s the regular set of the brand new observations. (bottom) Since during the ideal, but also for rain centroid and you may tropical 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? 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.