1) Model runs utilized

step 1 (Delworth et al. 2006) featuring a small-frequency dynamical center (Lin 2004) with a lateral resolution of around 2° latitude and you will twenty four straight membership. The atmospheric model is coupled in order to an excellent slab water which have spatially consistent depth. Four ensemble members that have recommended sea depths out of 2.4, 6, several, twenty asian hookup app near me four, and you can 50 m is analyzed contained in this studies. The latest design is forced of the seasonally varying insolation that have no eccentricity and you may ° obliquity, which will be work at having twenty years, adequate to converge for the a constant climatology. The newest design climatology is actually extracted from the last five years off the fresh integrations.

2) Show

The seasonal migration of the ITCZ off the equator has a larger amplitude for shallower ocean depths (Fig. 8) and P_Cent 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) Regular set of precipitation centroid and you will atmospheric heat transportation along the equator on the slab ocean aquaplanet simulations with every simulation (ocean breadth) given by a separate colour. The new regular range are double brand new amplitude of your own yearly harmonic each and every changeable while the mountain of one’s range ‘s the regression coefficient of one’s month-to-month study. The new black asterisks could be the month-to-month observations plus the good black colored range is the regular list of the fresh new findings. (bottom) As the at best, but for rain centroid and you will exotic SST gradient.

(top) Seasonal range of precipitation centroid and you may atmospheric temperatures transport along the equator on slab water aquaplanet simulations with each simulation (ocean depth) given by a unique color. The latest seasonal variety is actually double the new amplitude of your yearly harmonic each and every adjustable in addition to mountain of your own line ‘s the regression coefficient of the month-to-month research. The new black asterisks is the monthly findings and solid black colored line ‘s the seasonal range of this new observations. (bottom) Since within ideal, but also for rain centroid and you can exotic SST gradient.

(top) Regular range of precipitation centroid and you may atmospheric heat transport across the equator on the slab sea aquaplanet simulations with every simulator (sea depth) given by another color. The latest regular assortment is double the new amplitude of the yearly harmonic of every changeable additionally the slope of range ‘s the regression coefficient of month-to-month study. The new black colored asterisks certainly are the monthly findings while the strong black colored range ‘s the seasonal listing of the findings. (bottom) Since the at the best, but for rain centroid and warm SST gradient.

The seasonal amplitude of AHT_EQ 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 AHT_EQ; 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.