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The model integrations are performed into the Geophysical Fluid Fictional character Lab (GFDL) Atmospheric Model variation dos

The model integrations are performed into the Geophysical Fluid Fictional character Lab (GFDL) Atmospheric Model variation dos

1) Model operates used

step one (Delworth mais aussi al. 2006) offering a limited-regularity dynamical center (Lin 2004) with a lateral quality of around 2° latitude and you can 24 straight kinkyadsprofiel zoeken profile. The fresh atmospheric design are paired to help you a slab sea having spatially uniform depth. Five ensemble participants which have recommended ocean depths out-of 2.cuatro, 6, twelve, 24, and you will 50 meters is analyzed within this research. The newest design are pressed of the seasonally differing insolation with no eccentricity and you can ° obliquity, that’s work at to possess twenty years, enough to gather to the a steady climatology. The new model climatology are obtained from the past 5 years away from the fresh new integrations.

2) Results

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 set of precipitation centroid and you will atmospheric temperature transport across the equator throughout the slab sea aquaplanet simulations with every simulator (ocean depth) given by yet another color. The brand new seasonal range try twice the fresh new amplitude of the annual harmonic each and every varying while the mountain of range ‘s the regression coefficient of your monthly analysis. The fresh black asterisks will be the monthly findings in addition to strong black line ‘s the regular range of the observations. (bottom) Because during the most useful, but for rain centroid and you can warm SST gradient.

(top) Regular range of rain centroid and you will atmospheric heat transport over the equator throughout the slab water aquaplanet simulations with each simulator (ocean depth) supplied by an alternate color. Brand new seasonal range try double the brand new amplitude of one’s annual harmonic of each and every adjustable and hill of the line ‘s the regression coefficient of your monthly studies. This new black asterisks will be the month-to-month observations in addition to good black colored range is the regular range of the findings. (bottom) Since within most readily useful, but for precipitation centroid and you may warm SST gradient.

(top) Regular directory of rain centroid and you can atmospheric heat transport across the equator regarding the slab water aquaplanet simulations with each simulation (water breadth) given by a different sort of color. The brand new regular assortment is twice the latest amplitude of the annual harmonic of each adjustable therefore the mountain of your own line is the regression coefficient of your monthly studies. The brand new black colored asterisks would be the month-to-month observations plus the solid black range ‘s the seasonal selection of the latest observations. (bottom) Once the at the top, however for precipitation 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? 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.

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