Key Global Ocean-Atmosphere Coupled Mode And Phase Relation

This paper chooses seven air-sea thermal parameters, as following:SST、Sea Surface Air Temperature、Sensible Heat Flux、Latent Heat Flux、Long-Wave Radiation Flux、Short-Wave Radiation、Net Heat Flux, and uses Singular Value Decomposition (SVD)、lead/lag correlation analysis method to study spatial and temporal distribution characteristics of air-sea thermal parameters and phase relation for air-sea coupled mode. On the one hand, the paper studies seasonal variation characteristic of air-sea thermal parameters, characteristics of spatial-temporal variations for main mode for each air-sea heat parameters. The paper focuses on the variation characteristics of above two main modes, and analyses the influence of cold and warm ENSO events for each air-sea thermal parameters. On the other hand, the paper also studies phase relationship between SST and each thermal parameters, focusing on analysis the influences of cold and warm ENSO events for air-sea interaction.The paper uses SVD to analyses characteristics of spatial-temporal variations of seven air-sea thermal parameters, and focus on the variation characteristic of the former 2 main modes and lay emphasis on the influence of cold and warm ENSO events on air-sea thermal parameters. The main conclusions are:(1) the seasonal variation characteristic of Latent Heat Flux and Short-Wave Radiation which is main factor influencing seasonal variation of surface net heat flux, is the most obvious. Kuroshio and its extension sea、north Atlantic ocean gulf stream area is the region where seasonal variation of air-sea heat fluxes is the most obvious. (2) There is strong coupling relationship among SST, Latent Heat Flux, Short-Wave Radiation, Sea Surface Air Temperature in mode 1 and 2. Such manifest that cold and warm ENSO events influence air-sea heat flux exchanges. (3) The relativity for time coefficient of SST and Sea Surface Air Temperature in mode 1 reaches 0.9767, and the spatial distribution for main mode of SST and Sea Surface Air Temperature is similar, which manifests there is strong coupling relationship. In addition, the lead/lag relationships of each grid point between sea surface temperature and various thermal parameters of atmosphere were obtained. The main conclusions are:the characteristics of phase relation of SST and Heat flux are:(1) the lead/lag relationships between SST and different sea surface flux are different. The phase relation of SST and Latent Heat Flux、Sensible Heat Flux、Net Long-Wave Radiation Flux are similar, all of which are dominated sea lead, and the rest are dominated by air lead. (2) The phase relation for the same sea surface flux in different sea and SST are also different. (3) The phase relation between different air-sea thermal parameters can reflect the strength of the air-sea interaction. The strength of the air-sea interaction is different. (4) Sea surface temperature lags SST around 7 d and sea surface temperature leads SST around-10 d. (5) Cold and warm ENSO events of would influence the air-sea phase relation.There are several problems in this paper:because the paper uses day to day high-resolution data, so difference exists between results of this paper and former studies. The analysis for each air-sea thermal parameters only stays on phenomenon analysis angle, but the explanations for physical mechanism behind phenomenon need to be strengthened. So the paper needs to be studied more deeply.