Roles of energy conservation and climate feedback in Bjerknes compensation: a coupled modeling study

Dai, Haijin; Yang, Haijun; Yin, Jun

doi:10.1007/s00382-016-3386-y

Cited by 15 publications

(23 citation statements)

References 44 publications

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“…hereafter DA19), surface warming (Pithan and Mautisten, 2014), vertical lapse rate variation (Goosse et al, 2018), water vapor variation and cloud variation (Sejas et al, 2014). Increased CO2 forcing impedes longwave radiation escaping the Earth system, enhances surface temperature, and is considered the original reason for global warming (Yang et al, 2017). Surface albedo variation (mainly due to sea-ice loss) allows more solar radiation to be absorbed at the surface of the polar ocean, which in turn enhances surface temperature and decreases sea ice (positive feedback; Park et al, 2018).…”

Section: Accepted Articlementioning

confidence: 99%

“…The ice model is the Community Ice CodE, version 4 (CICE4; Hunke and Lipscomb, 2008), which has the same horizontal grid as the POP2. More details can be found in Yang and Dai (2015) and Dai et al (2017).…”

Section: Model and Experimentsmentioning

confidence: 99%

“…temperature increase is determined by sea surface temperature (SST) variation, which is a result of heat flux variation, remote forcing (i.e., meridional heat transport, MHT) variation, and heat storage ( Fig. 1c) in the subsurface ocean (Yang and Zhang, 2008;Dai et al, 2017); more details are given in Text S2. Since variation in MHT (sum of atmospheric meridional heat transport (AHT) and oceanic meridional heat transport (OHT)) contributes little (0.01 W/m 2 ; Fig.…”

Section: Accepted Articlementioning

confidence: 99%

“…The vertical lapse rate leads to a negative feedback in the tropics (a warmer surface increases vertical convection, which brings more heat upward, causing the upper layers [surface] to warm up [cool down]), while it often leads to a positive feedback in the polar region due to the stable stratification there (Goosse et al., 2018). Due to surface warming, water vapor increases and amplifies the greenhouse gas effect and enhances the surface warming (positive feedback), although the water vapor feedback is much smaller in the Arctic than in the tropics (H. Dai et al., 2017). Clouds influence the radiative flux in both visible (shortwave) and infrared (longwave) bands, although the feedback is uncertain due to different heights and types of clouds (Huang et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

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Roles of Surface Albedo, Surface Temperature and Carbon Dioxide in the Seasonal Variation of Arctic Amplification

Dai

2021

Geophysical Research Letters

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A decrease in surface albedo over ice‐covered ocean leads to global warming and Arctic‐amplified warming. Numerical results indicate seasonal variation in Arctic amplification (AA) is a result of local forcing and feedbacks in the Arctic. A decrease in surface albedo leads to a positive feedback, which dominates the local forcing and feedback mechanism. Ocean heat storage in the subsurface acts as a heat forcing to delay the influence of surface albedo feedback. In summer (autumn), heat storage increases (discharges) and contributes to a negative (positive) heat forcing, which decreases (increases) the positive local forcing and feedback and triggers the occurrence of the minimum (maximum) AA. In addition, increased CO2 forcing largely decreases the outgoing longwave radiation at the surface and increases surface temperatures, especially at low latitudes and in the Arctic winters, which decreases the AA magnitude and seasonal variation, although the AA remains nearly the same during winter.

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Section: Accepted Articlementioning

confidence: 99%

Section: Model and Experimentsmentioning

confidence: 99%

Section: Accepted Articlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Roles of Surface Albedo, Surface Temperature and Carbon Dioxide in the Seasonal Variation of Arctic Amplification

Dai

2021

Geophysical Research Letters

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“…Cloud feedback can be positive or negative due to different cloud types and heights (Huang et al., 2017). Water vapor feedback in the polar region can be neglected due to a small magnitude of moisture (Dai et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

The Seesaw of Seasonal Precipitation Variability Between North China and the Southwest United States: A Response to Arctic Amplification

et al. 2021

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The global surface temperature has increased over the last two centuries in response to forcing resulting from anthropogenic greenhouse gas (GHG) emissions (mainly increases the carbon dioxide [CO 2 ] concentration), with a characteristic pattern of Arctic-amplified-warming, or "Arctic amplification" (Screen & Simmonds, 2010). Previous studies suggested that Arctic amplification is a result of local forcing and feedback (Stuecker et al., 2018). Increased CO 2 forcing is considered as the trigger for global warming in recent centuries (Dai et al., 2019). However, Dai (2021) argues that direct effect of increased CO 2 forcing may decrease Arctic amplification by inducing stronger warming at low latitudes. According to estimates with radiative kernel method (Dai, 2021;Goosse et al., 2018;Graversen et al., 2014;Huang et al., 2017), positive feedback of surface albedo dominates the local forcing and feedback in polar regions (Dai, 2021), which induces large amounts of solar radiation absorption at the sea surface (in polar ocean). Surface temperature

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The Role of Ocean Dynamics in the Cross-equatorial Energy Transport under a Thermal Forcing in the Southern Ocean

Liu

Luo

et al. 2021

Adv. Atmos. Sci.

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Roles of energy conservation and climate feedback in Bjerknes compensation: a coupled modeling study

Abstract: temperature are always negative and strong outside the tropics, well offsetting positive feedbacks in most regions and resulting in undercompensation. Different dominant feedbacks give different BJC scenarios at different regions, acting together to maintain the local energy balance.

Cited by 15 publications

References 44 publications

Roles of Surface Albedo, Surface Temperature and Carbon Dioxide in the Seasonal Variation of Arctic Amplification

Roles of Surface Albedo, Surface Temperature and Carbon Dioxide in the Seasonal Variation of Arctic Amplification

The Seesaw of Seasonal Precipitation Variability Between North China and the Southwest United States: A Response to Arctic Amplification

The Role of Ocean Dynamics in the Cross-equatorial Energy Transport under a Thermal Forcing in the Southern Ocean

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