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HOME >Climate System Monitoring > Monthly Highlights on the Climate System

Monthly Highlights on the Climate System

'Monthly Highlights on the Climate System' has been issued in PDF format since March 2007 as a monthly bulletin focusing on the monthly highlights of the monitoring results.

Highlights in October 2018

- It is considered that El Niño conditions are present in the equatorial Pacific (see El Niño Outlook updated on 9 November 2018).
- Monthly precipitation amounts were above normal in Hokkaido and Okinawa/Amami, and monthly mean temperature was significantly below normal in Okinawa/Amami.
- Monthly mean temperatures were extremely high from eastern Japan to central Micronesia, from northeastern Turkey to central Europe, from southeastern Alaska to the northeastern part of Eastern Siberia, and in eastern Australia.
- Convective activity was enhanced from Western Africa to the Arabian Peninsula and was suppressed over the eastern part of the tropical South Indian Ocean and around the Philippines.
- In the 500-hPa height field, wave trains were dominant over mid- and high-latitudes with positive anomalies over Central Siberia and the seas east of Japan, and negative anomalies from eastern Canada to Greenland. Zonally elongated negative anomalies were seen over southern Eurasia.
- The subtropical jet stream shifted southward from its normal position over southern Eurasia.

Full version (PDF)

The descriptions until April 2011 are based on the old normal (i.e., the 1979 - 2004 average).
The descriptions until January 2014 are based on the JRA-25/JCDAS datasets.

Figures and Tables

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Tokyo Climate Center, Climate Prediction Division, 1-3-4 Otemachi, Chiyoda-ku, Tokyo, Japan.
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