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Ǯ����ή�����̵�����Ǯ�ӳ��̿岹���Ф����������ľ��Ǯ�ե�å��� �δ�Ϳ-(���� ��ʿ) ȯɽ�� :
����ή������(Ǯ�ӷ�����)���㲹�Τ���ˡ�Ǯ�ӷ����̤��̲ᤷ�� ���ط��˻��������ο������ŷ뤵������̤Ȥ������ط��˴����⤿�餹�� ����Ρ����ط��ο�����̤�ȥ����뤹��������ġ� Ǯ�ӷ����̵�������ư�ᥫ�˥��������ΤϽ��פȤʤ롣 Ǯ�ӷ����̵����ϵ�����ư����ۤ��Ƥ��ꡢ���μ��פ���ư�ᥫ�˥���Ȥ��ơ� ���ط��������٤����Ť���ץ�ͥ���Ȥθ���(Holton et al.,1995�ʤ�)�ȡ� Ǯ�ӤǷ������оΤ���ή�ˤ���嵯���줿�Ȥθ��� (Kerr-Munslow and Norton, 2006; Norton, 2006)�����롣 �ܸ���Ǥ��絤��۴ĥ�ǥ�(CCSR/NIES AGCM)����Ѥ��� Ǯ�ӳ��̿岹(SST)ʬ�ۤ���ή�����̤���Ǯ�ӷ����̵�����Ϳ����ƶ���Ĵ�٤��� �Ԥä����ͼ¸��ϥ�ǥ�ǻ��Ѥ��뵤����SST���Ф�Ǯ��(15S-15N)�ˤ����ơ� SST�η��������(����ʿ�Ѥ���Τ���)������/���ꤵ�������ͼ¸�(S'runs)�ȡ� SST����ͤ˾徺/�㲼���������ͼ¸�(S runs)�Ǥ��롣 ���ͼ¸��η�̡�Ǯ��SST�η�������ͤ�����/���ꤵ����ȡ� Ǯ�ӷ����̵������㲼/�徺���뤳�Ȥ����餫�ˤʤꡢ �����Ѳ����Ф�Matsuno-Gill�ѥ�����(Matsuno, 1966; Gill, 1980)��������� ������α��ˤ���ľǮ͢���αƶ�����ۤ��뤳�Ȥ������줿�� ����Ͻ���������褿Ǯ�ӷ����̵�������ư�ᥫ�˥���Ȥϰۤʤ뿷�������̤Ǥ��롣 �ޤ����Ƥμ¸��ǡ�Ǯ��50hPa�ն�ˤ����ơ� ��ľή�ˤ����Ǯ�����Ѳ����б������������Ѳ�������줿�� ������Ǯ��SST�η�������ͤϥ���ˡ��˥�������ư(ENSO)�ȴط����������ᡢ ���¤�ENSO���٥�Ȥ�����ʻ���(1996ǯ-1999ǯ)�δ�¬SST���Ѥ������ͼ¸��ȡ� ��¬(ERA40)����Ӥ����ꡢξ�Ԥ���������Ҥο��ͼ¸��η�̤�ٻ������̤�����줿�� Abstract: The tropical tropopause (TT) temperature is controlled both by the midlatitude stratospheric pump and equatorial waves caused by tropical convection. To understand how the TT temperature is influenced by tropical convection, variations of TT temperature associated with changes in the tropical sea surface temperature (SST) distribution are examined with an atmospheric general circulation model (CCSR/NIES AGCM). In one type of experiment, the zonal asymmetry of tropical SST is changed (S' runs). In the other type of experiment, tropical SSTs are changed uniformly (S runs). For all experiments, adiabatic cooling or heating induced by changes in the Brewer-Dobson circulation is dominant in the tropical lower stratosphere (50 hPa), which is consistent with control by the stratospheric pump. However, at the TT level (90 hPa), adiabatic effects are not a primary factor. In S' runs, the enhancement (weakening) of the tropical SSTs' zonal asymmetry causes cooling (warming) of zonal-mean TT temperature via a vertical eddy heat flux associated with a Gill-type equatorial wave pattern. These results show that the vertical eddy heat flux is important for causing variations of zonal-mean TT temperature, especially interannual variations associated with ENSO.
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