会議発表用資料 A preliminary hindcast experiment for CMIP6/OMIP using COCO4.9: comparison with a case forced by a new dataset JRA55-do

小室, 芳樹  ,  建部, 洋晶  ,  鈴木, 立郎  ,  黒木, 聖夫  ,  渡辺, 路生  ,  KOMURO, Yoshiki  ,  TATEBE , Hiroaki  ,  SUZUKI , Tatsuo  ,  KUROGI , Masao  ,  WATANABE , Michio

2017-05-21
内容記述
A preliminary experiment for CMIP6/OMIP (Griffies et al., 2016) has been conducted by using an ice-ocean coupled general circulation model COCO4.9 (Hasumi, 2006), which is the ice-ocean component for the Model for Interdisciplinary Research on Climate (MIROC; Watanabe et al., 2010). Following the CMIP6/OMIP protocol, we have performed five cycles of 62-year-long experiment forced by 1948-2009 atmospheric forcing (Large and Yeager, 2009). The last cycle of the A experiment shows realistic results. We also conducted another experiment, in which the model has the same setting but is driven by a new surface dataset, JRA55-do (Tsujino et al., 2017, personal communication), based on the Japanese 55-year Reanalysis or JRA-55 (Kobayashi et al, 2015; Harada et al., 2016). Results of the two experiments are compared, with a focus on Arctic sea-ice. Over the last 30 years of the 20th century, climatological sea-ice extent and volume for summer and their interannual variability are similar between the two cases. On the other hand, decreasing trend in sea-ice extent and volume over the same period are significantly larger in the JRA55-do case.
AOS19-04口頭発表 / JpGU-AGU Joint Meeting 2017 (2017年5月20日~5月25日 幕張メッセ国際会議場)
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http://www.jamstec.go.jp/jdb/ronbun/Ks00052333.pdf

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