Identification

Title

paleoWeather: CESM-HR simulations with water isotopes for the Early Eocene Climatic Optimum

Alternative title(s)

d651089

Abstract

Supported by an Accelerated Scientific Discovery (ASD) Derecho computing grant (ACGD0008 to Otto-Bliesner; PaleoWeather), high-resolution Community Earth System Model (CESM-HR) simulations of the Early Eocene Climatic Optimum (EECO, ~50 million years ago) have been completed. The high-resolution simulations also include water isotope capability, enabling direct comparisons with isotope records of past and present climate change from a range of archives. The simulations followed the protocols of the Deep-time Model Intercomparison Project (DeepMIP) and were conducted at atmospheric CO2 concentrations of 3× and 6× preindustrial levels (284.7 ppmv) to span the plausible CO2 range inferred from the geological record. Each simulation was initialized from a near-equilibrated, low-resolution companion simulation and integrated for 60 years. Further details of the experimental design and simulation results can be found in Zhu et al. (2026; DOI: 10.21203/rs.3.rs-9097760/v1). The EECO dataset is one of four high-resolution simulation datasets produced through the ASD PaleoWeather project. The other datasets represent the Preindustrial (21 TB), Last Glacial Maximum (29 TB), and mid Pliocene Warm Period (28 TB). Establishing separate GDEX dataset records for each period will allow the respective leads who set up and ran the simulations to serve as leads for the corresponding DOI. Each GDEX landing page will include links to the other PaleoWeather simulations, enabling discovery and comparison across climate periods. To our knowledge, the ASD PaleoWeather collection represents the first high-resolution paleoclimate simulation suite of this kind made available to the community. Its horizontal grid spacing is approximately ten times finer than traditional climate-model configurations, which typically use resolutions of 1-2 degrees. The CESM-HR resolution more realistically represents synoptic and mesoscale atmospheric and oceanic phenomena, together with their interactions with large-scale circulation. The EECO dataset will support research on weather-climate interactions in a warm-climate state, including studies of extreme events such as heat waves, atmospheric rivers, and tropical cyclones. More broadly, the PaleoWeather simulations complement the MESACLIP historical and future simulations, providing opportunities to investigate links between climate and weather extremes across Earth's past, present, and future climate states.

Resource type

dataset

Resource locator

https://gdex.ucar.edu/datasets/d651089/

protocol: https

name: Dataset Description

description: Related Link

function: information

https://gdex.ucar.edu/datasets/d651089/dataaccess/

protocol: https

name: Data Access

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

reference date

date type

revision

effective date

2021-03-30

Keyword set

keyword value

CESM > NCAR Community Earth System Model

originating controlled vocabulary

title

reference date

date type

revision

effective date

2026-09-02

Keyword set

keyword value

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

EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > LIQUID PRECIPITATION > RAIN

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > SEA LEVEL PRESSURE

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

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE

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

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > UPPER AIR TEMPERATURE

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

originating controlled vocabulary

title

reference date

date type

revision

effective date

2026-09-02

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2026-09-14

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

name: NSF NCAR Geoscience Data Exchange

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

2026-09-14T21:35:47Z

Metadata language