Identification

Title

Idealized Interdecadal Pacific Oscillation (IPO) Pacemaker

Alternative title(s)

d651031

Abstract

This archive contains data from the CESM1 Idealized Interdecadal Pacific Oscillation (IPO) pacemaker ensemble. Three sets of idealized Pacific pacemaker simulations were performed. One standard deviation of SST anomalies was added to the model simulated SST in the Pacific between 40S-60N: positive IPO, negative IPO, neutral IPO. For each set, ten starting years were chosen with different states of the IPO from the CESM1 large-ensemble preindustrial control run: negative IPO (years 926, 1331, 1366); positive IPO (years 606, 1011, 1251); Neutral IPO, but trending towards negative (year 1321, 1356); and Neutral IPO, but trending towards positive (year 1001, 1241). For each of these starting years, the simulations started on January 1 and the model simulations were run for 10 years. The experiments were named by the IPO phase, pre-industrial control start year, and sign of the added SST anomaly. For example, simulations with "IPO_p2p.syr1251" in the name, translates as follows: "_p2p" refers to a positive IPO initial state ("_p") , with an added positive SST anomaly (denoted by "2p"), and a starting year from the CESM1 Large Ensemble pre-industrial control of 1251. In the filenames, "p2p", "n2p", "2p2p" and "2n2p" represent idealized positive IPO experiments (denoted by the last letter being "p" or the last two letters being "2p") where positive IPO SST anomalies are added onto the model simulated SSTs. The first letters "p", "n", "2p" or "2n" represent the initial IPO states, such as "p" representing positive IPO initial states, "n" representing negative IPO initial states, and "2p" ("2n") representing neutral IPO states trending towards positive (negative). Simulations with "p2n", "n2n","2p2n" or "2n2n" in their filenames are negative IPO experiments where negative IPO SST anomalies are added onto the model simulated SSTs. The first one (or two) letter(s) represent the initial state of the IPO. Similarly, simulations with "p2c","n2c","2p2c","2n2c" in their filenames are neutral IPO experiments where neutral IPO SST anomalies are added onto the model simulated SSTs. The purpose for these different starting states of the IPO is to test whether the influence of the IPO on other parts of the globe depends on the initial states of the IPO. An example would be whether the climate response would be larger in an idealized positive IPO experiments with an initial state of positive IPO rather than initial state of a negative IPO. Note: Beyond the simulations documented above, there are additional simulations in this archive. All simulations with "1pct.syr", "2pct.syr", "IPOm_rstr2","IPOp_rstr2" in their filenames should not be used.

Resource type

dataset

Resource locator

https://gdex.ucar.edu/datasets/d651031/

protocol: https

description: Related Link

function: information

https://gdex.ucar.edu/datasets/d651031/dataaccess/

protocol: https

description: Related Link

function: download

Unique resource identifier

code

codeSpace

Dataset language

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

climatologyMeteorologyAtmosphere

Keywords

Keyword set

keyword value

dataset

originating controlled vocabulary

title

Resource Type

reference date

date type

revision

effective date

2021-03-30

Keyword set

keyword value

CESM > NCAR Community Earth System Model

originating controlled vocabulary

title

U.S. National Aeronautics and Space Administration Global Change Master Directory

reference date

date type

revision

effective date

2026-02-13

Keyword set

keyword value

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > SEA LEVEL PRESSURE

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > UPPER AIR TEMPERATURE

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR INDICATORS > HUMIDITY > SPECIFIC HUMIDITY

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > U/V WIND COMPONENTS

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > WIND DYNAMICS > VERTICAL WIND VELOCITY/SPEED

EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > LIQUID PRECIPITATION > RAIN

EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > PRECIPITATION PROFILES > LATENT HEAT FLUX

originating controlled vocabulary

title

U.S. National Aeronautics and Space Administration Global Change Master Directory

reference date

date type

revision

effective date

2026-02-13

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

0606-01-01

End position

1375-12-31

Dataset reference date

date type

publication

effective date

2020-01-30

Frequency of update

notPlanned

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Creative Commons Attribution 4.0 International License

Limitations on public access

None

Responsible organisations

Responsible party

organisation name

email address

datahelp@ucar.edu

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

NSF NCAR Geoscience Data Exchange

email address

datahelp@ucar.edu

web address

https://gdex.ucar.edu

description: The Geoscience Data Exchange (GDEX), managed by the Computational and Information Systems Laboratory (CISL) at NSF NCAR, contains a large collection of meteorological, atmospheric composition, and oceanographic observations, and operational and reanalysis model outputs, integrated with NSF NCAR High Performance Compute services to support atmospheric and geosciences research.

function: download

responsible party role

pointOfContact

Metadata date

2026-02-15T13:14:39Z

Metadata language

eng; USA