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 November 2024

- Convective activity was enhanced from the central tropical South Indian Ocean to Australia, to the north of the Philippines and in and around the Caribbean Sea, and suppressed from the western to central equatorial Pacific.
- In the upper troposphere, anti-cyclonic circulation anomalies straddling the equator were seen from the eastern Pacific to the western Indian Ocean through Africa. A wavy anomaly pattern was seen over southern Eurasia, with anti-cyclonic circulation anomalies in East Asia.
- In the 500-hPa height field, a wavy anomaly pattern was dominant in the Northern Hemisphere, with positive anomalies to the southwest of Alaska, from eastern Canada to Europe and over East Asia.
- The westerly jet streams shifted northward near Japan, and southward to the east of Japan from its normal position.
- The zonal mean temperatures in the troposphere were above normal from the tropics to the mid-latitudes in both hemispheres.
- Monthly mean temperatures were significantly above normal in western Japan and Okinawa/Amami, and above normal in northern/eastern Japan.
- Monthly precipitation amounts were significantly above normal on the Sea of Japan side of eastern/western Japan and Okinawa/Amami. On the Sea of Japan side of western Japan, they were the highest on record for November since 1946.

Full version (PDF)

Monthly Highlights on the Climate System (November 2024)
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The descriptions from May-2011 to April-2021 issue are based on the former climatological normal (1981-2010 average).
In the descriptions until April-2011 issue, 1979-2004 average is used as climatological normal unless otherwise stated.
The descriptions until January-2014 issue are based on the JRA-25/JCDAS datasets.
The descriptions from February-2014 to April-2023 issue are based on the JRA-55 reanalysis.

Figures and Tables

Notice: Products based on JRA-3Q were updated to those with improved quality in terms of tropical cyclone analysis. OLR-related products from January 1991 are based on NOAA CPC Blended OLR (CBO).

Notice: Figures of 'Atmospheric Circulation', 'Time Cross Section', and 'Indices' have been revised with improved quality data regarding tropical cyclone analysis. (18 June 2024)

Notice: Depending on the availability of NOAA CPC Blended OLR (CBO) data, updates may be delayed or figures may be filled with gray indicating data missing.

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Tokyo Climate Center, Climate Prediction Division.
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