1) Design works made use of
step 1 (Delworth et al. 2006) offering a small-regularity dynamical center (Lin 2004) which have a horizontal resolution of about dos° latitude and you may twenty four vertical membership. Brand new atmospheric design try combined in order to a good slab ocean that have spatially uniform breadth. Four dress users which have recommended sea deepness off dos.4, six, several, 24, and you can 50 yards try analyzed inside studies. The fresh new design try pressed by the seasonally varying insolation having no eccentricity and ° obliquity, and is work on to have 20 years, enough to converge on a stable climatology. The fresh design climatology try obtained from the very last 5 years out of the new integrations.
2) Efficiency
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 variety of precipitation centroid and you may atmospheric temperature transportation across the equator about slab ocean aquaplanet simulations with each simulation (ocean breadth) given by a unique color. Brand new regular range are twice the amplitude of your annual harmonic of every varying and also the hill of the range ‘s the regression coefficient of one’s month-to-month data. This new black colored asterisks are definitely the month-to-month findings therefore the strong black line is the regular list of the newest findings. (bottom) Just like the in the most useful, but for precipitation centroid and you may warm SST gradient.
(top) Seasonal directory of rain centroid and you may atmospheric temperatures transportation along the equator regarding the slab ocean aquaplanet simulations with every simulator (ocean breadth) provided by yet another color. The brand new seasonal diversity was twice this new amplitude of the annual harmonic of every variable plus the slope of one’s line ‘s the regression coefficient of monthly investigation. The newest black asterisks will be the monthly observations plus the good black colored range is the regular selection of brand new findings. (bottom) Just like the from the top, but for precipitation centroid and you may exotic SST gradient.
(top) Regular selection of precipitation centroid and you will atmospheric temperature transport over the equator on the slab ocean aquaplanet simulations with each simulator (water breadth) offered by a separate color. The regular range try double the amplitude of your own yearly harmonic of each and every changeable while the slope of your line ‘s the regression coefficient of your own month-to-month studies. The latest black asterisks will be month-to-month observations and strong black colored sexchat com range ‘s the regular selection of the findings. (bottom) As the during the most useful, however for rain centroid and you can warm 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.