Page 67 - APEC CLIMATE CENTER 2025 Annual Report

APEC CLIMATE CENTER 2025 ANNUAL REPORT

APPENDIX 1 APCC (www.apcc21.org) provides comprehensive climate information services to APPENDIX 2 The APEC Climate Center (APCC) disseminates high-quality climate forecast information

end-users around the world.
based on the multi-model ensemble (MME) on the 15th of every month. Currently, 16 op-
erational institutes from 11 countries participate in the APCC MME. Real-time forecasts
APCC Climate APCC Multi- by the APCC MME are provided on the APCC homepage monthly (https://www.apcc21.
org/?lang=en).
Information Services Model Ensemble

Participating Model 1. Introduction of New MME Members and Model Upgrades
The CGCMv1.0 model developed by Pukyong National University (PKNU) was registered as
Services Function Screen Contents a new MME provider in 2024 and has officially participated in APCC MME forecasting since
February 2025. In addition, model upgrades implemented by CWA, METFR, and CMCC in
• APCC provides high-quality 6-month climate
Seasonal Forecast 2025 have further strengthened the overall configuration of the MME system.
outlooks, updated monthly, for APEC member
(Climate forecast
economies and climate-related agencies
for 3 or 6 2. Extension of the Hindcast Base Period
worldwide.
months)
(https://apcc21.org/ser/global/outlookSummary.do?lang=en)
To comply with the recommendations of the World Meteorological Organization (WMO)
BSISO (Boreal • The BSISO is one of the dominant phenomena over and to better reflect recent climate variability, the hindcast base period for the MME pre-
Provision Summer the Asian summer monsoon region. The BSISO diction system was extended from 1991–2010 (20 years) to 1993–2016 (24 years). This up-
of Climate Intraseasonal monitoring index for 15 to 60 days is provided via date has been applied to forecasts issued since August 2025.
Information Oscillation) the APCC homepage in real time.
Forecast (https://apcc21.org/prediction/bsiso/intro?lang=en)
3. Enhancement of the ENSO Alert System
• APCC presents information on major climate
The APCC ENSO Alert System was revised to clearly distinguish between the developing
variables, including droughts, floods, and
Climate Monitoring atmospheric circulation, on a weekly, monthly, and and decaying phases of ENSO events by introducing a slope condition for the Ocean-
ic Niño Index (ONI). As a result, during the decaying phase, a clear “Final” alert is issued
seasonal basis.
(https://apcc21.org/ser/high.do?lang=en) instead of downgrading the status to “Watch” or “Alert.” This revised criterion has been
applied since the October 2025 forecast.
APCC Climate Services Platform
enabling the provision of climate information
Provision services by which users can effectively utilize various 4. Provision of High-Resolution Verification Information
climate data To improve the accuracy of forecast performance evaluations, the verification framework
APCC Climate
· Provision Service : A platform-based climate data was upgraded from a low-resolution (2.5°) to a high-resolution (1.0°) system. In addition,
Services Platform
service that allows downloading APCC climate
(https://apcc21.org/ observational and reanalysis datasets used for verification, excluding SST, were standard-
information in various formats.
Customized clik) ized to ERA5 to ensure physical and dynamical consistency. High-resolution verification
Climate · Production Service : A service that enables users
Production results have been officially provided since December 2025.
Information to select climate models, variables of prediction,
Service regions, and analysis techniques online to
produce MME climate prediction information and
statistically downscaled information for desired
areas.
· Processing Service : A service enabling the
Processing
extraction of the values of climate variables in user-
desired areas or periods from a large amount of
climate data in a variety of data formats
• APCC provides an independently developed
fire and haze EWS, which translates 6-month
precipitation data into fire danger ratings to prevent
SEA Fire and Haze
dangerous forest fires and haze.
Early Warning
1. Indonesia: Available annually from April to July
System (FHEWS)
(https://www.apcc21.org/prediction/fhewsid)
Use of 2. Malaysia: Available from October to March every year
Climate (https://www.apcc21.org/prediction/fhewsmy)
Information
• APCC provides yield forecasts for major producing
countries for the world's four major crops (maize,
Global Crop Yield rice, wheat, and soybean) on the 20th of every
Forecast Service month, utilizing APCC MME seasonal forecast data.
( https://www.apcc21.org/prediction/
naro_methodology?lang=en)

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