On annual time scale, the contributions to X and Y components of polar motion are 16% and 43%, respectively, while on semi annual time scale, the contributions are 9% and 30%.
其中，大气在周年尺度上对极移X分量的贡献为1 6% ，对Y分量的贡献为43% ；在半年尺度上对极移X分量的贡献为9% ，对Y分量的贡献为30 % 。
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