Research

Basic research

Home  >  Research  >   Basic research
CATEGORY
ㆍClimate change ㆍAir - Sea interactions ㆍInternal climate variability
ㆍEast Asian monsoon ㆍClimate Modeling ㆍClimate Chemistry interactions

Fundamental 
 

▶  Previous studies suggest that it is reasonable to expect a direct relationship between sea surface temperature and deep convection cloud(SST-DCC), however, the relationship between the local SST and DCC over warm ocean SST> 27°C) is rather complex because of the influence of large-scale atmospheric dynamics that govern atmospheric convergence in the lower and middle troposphere and divergence aloft [Graham and Barnett, 1987; Waliser and Graham, 1993; Zhang, 1993; Meenu et al., 2012].

 

▶  Waliser et al. (1993) found that the characteristic of the relationship between SST and DCC is such that at temperature between 27 and 29°C, convection increases with increasing SST, but above 29°C(i.e. in the western tropical Pacific during boreal summer), the intensity of convection observed tends to decrease with increasing SST.

 

▶  That is, The SST-DCC correlation is highly positive in the central-to-eastern tropical Pacific, the core region of interannual variability associated with El Nino-Southern Oscillation (ENSO), On the other hand, the overall summer SST-DCC relationship has a negative correlation in the western tropical Pacific, this relationship experiences a significant interannual variation [R Wu and Kirtman, 2005; B Wu et al., 2009; Kumar et al., 2013]. 


59d8c80708cf45660cdbb5b0f105deef_XKsZZj8Z8uF43Wx1plGDfWDdh9C.png



Result


59d8c80708cf45660cdbb5b0f105deef_ksF571E9WRFKElWe9tt.png



References

 ▶  Graham, N., and T. Barnett(1987), Sea surface temperature, surface wind divergence, and convection over  tropical oceans, Science,238(4827), 657-659.

 ▶  Kumar, A., M. Chen, and W.Wang (2013), Understanding prediction skill of seasonal mean precipitation over the tropics, J. Clim., 26(15), 5674-5681.

▶  Meenu,S., K. Parameswaran, and K. Rajeev (2012), Role of sea surface temperature and wind convergence in regulating convection over the tropical Indian Ocean,J. Geophys. Res. Atmos., 117.

 ▶  Waliser, D. E., and N. E.Graham (1993), Convective cloud systems and warm‐pool sea surface temperatures: Coupled interactions and self‐regulation,J. Geophys. Res. Atmos., 98(D7), 12881-12893.

 ▶  Wu, B., T. Zhou, and T. Li(2009), Contrast of Rainfall-SST Relationships in the Western North Pacific between the ENSO- Developing and ENSO-Decaying Summers*, J. Clim., 22(16),4398-4405.

▶  Wu,R., and B. P. Kirtman (2005), Roles of Indian and Pacific Ocean air–sea coupling in tropical atmospheric variability,  Clim. Dyn., 25(2-3),155-170.

▶  Zhang,C. (1993), Large-scale variability of atmospheric deep convection in relation to sea surface temperature in the tropics, J. Clim., 6(10), 1898-1913.