Change in the contribution of spring snow cover and remote oceans to summer air temperature anomaly over Northeast China around 1990

Wu, Renguang; Zhao, Ping; Liu, Ge

doi:10.1002/2013jd020900

Cited by 37 publications

(27 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The persistence of the wave train in the wind difference fields over Eurasia is a suggestion of possible lower boundary forcing on atmospheric circulation. The circulation anomalies over Eurasia have been linked to the North Atlantic SST anomalies in previous studies [ Z. Wu et al ., ; Wu et al ., , , ]. Recently, tropical North Atlantic SST anomalies are shown to excite a Rossby wave pattern propagating from western tropical Atlantic to Europe, thereby influencing the southeastern Europe winter precipitation [ Hatzaki and Wu , ].…”

Section: Atmospheric Circulation Change and Roles Of Equatorial Atlanmentioning

confidence: 99%

Interdecadal change of Eurasian snow, surface temperature, and atmospheric circulation in the late 1980s

Liu

2015

JGR Atmospheres

Self Cite

View full text Add to dashboard Cite

Boreal winter and spring snow cover extent and snow water equivalent over Eurasia experienced an obvious decrease in late 1980s. A concurrent surface warming is observed over the North Atlantic and Eurasia. The present study documents the relationship among the interdecadal changes in snow, surface air temperature, and wind and the plausible reason for this change. Analysis shows that the snow decrease contributes to the temperature increase only in some limited regions and that the surface warming is largely related to the change in atmospheric circulation. The effect of atmospheric circulation change on surface warming is manifested in wind-induced heat advection and cloud-radiation changes. The wind changes over the North Atlantic and Eurasia feature a wave train with an anomalous anticyclone over Europe and anomalous southerly winds over midlatitude east Europe and Asia. The anomalous southerly winds contribute to surface warming through advection of warmer air from lower latitudes. The anomalous anticyclone contributes to surface warming over Europe through anomalous warm advection by bringing warmer air from ocean and enhanced downward shortwave radiation by suppressing upward motion. The wave pattern appears to be connected to equatorial Atlantic warming. Warmer sea surface temperature (SST) in the equatorial Atlantic Ocean enhances convection and induces a lower level anomalous cyclone to the northwest of the SST warming. The role of equatorial North Atlantic SST increase in the formation of the wave train over Eurasia is supported by numerical experiments with an atmospheric general circulation model.

show abstract

Section: Atmospheric Circulation Change and Roles Of Equatorial Atlanmentioning

confidence: 99%

Interdecadal change of Eurasian snow, surface temperature, and atmospheric circulation in the late 1980s

Liu

2015

JGR Atmospheres

Self Cite

View full text Add to dashboard Cite

show abstract

“…A decrease in LH over northern Europe, the eastern European Plain, and western Siberia (Fig. 3, but for anomalies regressed on the normalized PC2 of MAM SAT during 1979-2010 SWE is compensated by the cloud-albedo effect associated with an increase in TCC (Figs. 2a,c).…”

Section: B Surface Heat Flux Anomaliesmentioning

confidence: 99%

“…Wu et al 2009;R. Using observational data and model simulations, previous studies have indicated that a tripole North Atlantic SST anomaly pattern can excite a wave train extending eastward from the North Atlantic to East Asia along the westerly jet waveguide (e.g., Z.…”

Section: B Roles Of Ao and North Atlantic Sst Anomaliesmentioning

confidence: 99%

“…They showed that the first mode of interannual variability of winter SAT, featuring a north-south dipole pattern, has a close relationship to the wintertime Arctic Oscillation (AO). Wu et al (2010Wu et al ( , 2011Wu et al ( , 2014b identified interdecadal changes in the influence of El Niño-Southern Oscillation (ENSO), North Atlantic sea surface temperature (SST), and regional snow on northeastern China summer SAT variations. Chen et al (2016) analyzed the interannual variation of summer SAT over northeastern Asia and its associated atmospheric circulation anomalies.…”

Section: Introductionmentioning

confidence: 99%

“…On the interannual time scale, SAT anomalies over most parts of Eurasia tend to be positive (negative) when AO is in its positive (negative) phase (Thompson andWallace 1998, 2000;Gong et al 2001;Wu and Wang 2002). Studies indicated that the SAT anomalies over Eurasia are associated with remote SST forcing through the large-scale atmospheric circulation pattern (Wu et al 2014a;Ye et al 2015). Studies indicated that the SAT anomalies over Eurasia are associated with remote SST forcing through the large-scale atmospheric circulation pattern (Wu et al 2014a;Ye et al 2015).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dominant Modes of Interannual Variability in Eurasian Surface Air Temperature during Boreal Spring

2016

Self Cite

View full text Add to dashboard Cite

This study investigates interannual variations of surface air temperature (SAT) over mid-and high latitudes of Eurasia during boreal spring and their association with snow, atmospheric circulation, and sea surface temperature (SST) changes. The leading mode of spring SAT variations is featured by same-sign anomalies over most regions. The second mode features a tripole anomaly pattern with anomalies over the central part opposite to those over the eastern and western parts of Eurasia. A diagnosis of surface heat flux anomalies suggests that snow change contributes partly to SAT anomalies in several regions mainly by modulating surface shortwave radiation but cannot explain SAT changes in other regions. Atmospheric circulation anomalies play an important role in spring SAT variability via wind-induced heat advection and cloud-induced surface radiation changes. Positive SAT anomalies are associated with anomalous westerly winds from the North Atlantic Ocean or with anomalous anticyclone and southerly winds. Negative SAT anomalies occur in regions of anomalous cyclone and northerly winds. Atmospheric circulation anomalies associated with the first mode have a close relationship to spring Arctic Oscillation (AO), indicating the impact of the AO on continental-scale spring SAT variations over the mid-and high latitudes of Eurasia. The atmospheric circulation anomalies associated with the second mode feature a wave pattern over the North Atlantic and Eurasia. Such a wave pattern is related to a tripole SST anomaly pattern in the North Atlantic Ocean, signifying the contribution of the North Atlantic Ocean state to the formation of a tripole SAT anomaly pattern over the mid-and high latitudes of Eurasia.

show abstract

Contrasting Eurasian spring and summer climate anomalies associated with western and eastern Eurasian spring snow cover changes

Liu

Zhao

2014

J. Geophys. Res. Atmos.

Self Cite

View full text Add to dashboard Cite

Spring snow cover variations over Eurasia consist of a same-sign component and a west-east dipole component. The same-sign component is dominant during late 1970s through 1980s, and the two components are equally important during 1990s and 2000s. Present study contrasted Eurasian spring and summer climate anomalies associated with western and eastern Eurasian spring snow cover variations and between 1975-1989 and 1993-2007 and found notable differences and obvious interdecadal changes in Eurasian climate anomalies. After 1990, spring surface temperature anomalies display an obvious west-east contrast pattern, consistent with a prominent atmospheric wave pattern over Eurasia. The temperature anomalies are larger corresponding to western than eastern Eurasian snow cover change. Snow-albedo effect plays a main role in temperature change during 1975-1989, whereas atmospheric processes also contribute largely to temperature change during 1993-2007. Large soil moisture anomalies occur corresponding to western Eurasian snow cover and during [1975][1976][1977][1978][1979][1980][1981][1982][1983][1984][1985][1986][1987][1988][1989]. The snow-hydrological effect on summer precipitation is mainly detected over the West Siberian Plain where soil moisture anomalies persist over 3 months. Over most of other Eurasian regions, atmospheric circulation pattern plays a dominant role in summer surface temperature and precipitation variations. The relationship of Indian summer rainfall to western Eurasian spring snow cover was weakened since the mid-1990s, and the correlation of Northeast China summer rainfall with local spring snow cover changed from positive to negative around 1990.

show abstract

Change in the contribution of spring snow cover and remote oceans to summer air temperature anomaly over Northeast China around 1990

Cited by 37 publications

References 52 publications

Interdecadal change of Eurasian snow, surface temperature, and atmospheric circulation in the late 1980s

Interdecadal change of Eurasian snow, surface temperature, and atmospheric circulation in the late 1980s

Dominant Modes of Interannual Variability in Eurasian Surface Air Temperature during Boreal Spring

Contrasting Eurasian spring and summer climate anomalies associated with western and eastern Eurasian spring snow cover changes

Contact Info

Product

Resources

About