Circumpolar Projections of Antarctic krill (Euphausia superba) growth potential

These data represent the results of the first study to use Earth System Model (ESM) outputs of SST and chlorophyll-a to simulate circumpolar krill growth potential for the recent past (1960-1989) and future climate change scenarios (2070-2099). Growth potential is obtained using an empirically-derived krill growth model (Atkinson et al. 2006, Limnol. Oceanogr.), where growth is modeled as a function of SST and chlorophyll-a. It serves as an approximation of habitat quality, as areas that support high growth rates are assumed to be good habitat (see Murphy et al., 2017, Sci Rep).


To increase confidence in the future projections, ESMs were selected and weighted for each season based on their skill at reproducing observation-based krill growth potential for the recent past. First, eleven ESMs which provided SST and chlorophyll-a outputs were obtained from the Coupled Model Inter-comparison Project 5 archive. These included: CanESM2, CMCC-CESM, CNRM-CM5, GFL-ESM2G, GFDL-ESM2M, GISS-E2-H-CC, HadGEM2-CC, IPSL-CM5A-LR, MPI-ESM-MR, MRI-ESM1 and NorESM1-ME. For each ESM, seasonal surface averages of SST and chlorophyll-a were used to calculate growth potential for the historical scenario (1960-1989), which was then bilinearly interpolated on to the same 1°x1° grid. Satellite observation-based datasets for SST and chlorophyll-a were used to calculate observation-based growth potential for the recent past (1997-2010). These comprised seasonal surface averages of SST (from the OISST v2 daily dataset, 1/4⁰ horizontal resolution) and chlorophyll-a (the mean of the SeaWiFS and Johnson et al. (2013) corrected estimate of SeaWiFS daily datasets, 1/12⁰ horizontal resolution). Observation-based growth potential was then bilinearly interpolated onto the same grid as the ESMs.


ESM skill for each season was subsequently assessed against observation-based growth potential using a Taylor Diagram. The ESMs were selected and weighted according to their performance to produce a weighted subset (see "ESM_weighting_method.pdf" file). Of the netcdfs provided, "hist_mean_ensemble.nc" represents the unweighted mean of seasonal growth potential, calculated from the initial ensemble of eleven ESMs for the historical scenario. The "hist_mean_subset.nc" file represents the analogous output of the weighted subset.


Future projections of seasonal growth potential for Representative Concentration Pathways (RCPs) 4.5 and 8.5 were obtained using the weighted subset for the period of 2070-2099. These projected seasonal surface averages are provided in the "rcp45_mean_subset.nc" and "rcp85_mean_subset.nc" files. RCPs represent standard climate change scenarios developed by the Intergovernmental Panel on Climate Change, with 4.5 reflecting some mitigation of carbon emissions, and 8.5 being the "business as usual" scenario.


Analogous netcdfs for the weighted subset outputs of chlorophyll-a (chl) and SST (tos) for the historical and RCP scenarios are also provided in the "chl_tos_netcdfs.zip" file so that the driving environmental variables underlying growth potential can be examined.

Simple

Identification info

Alternate title
Circumpolar Projections of Antarctic krill (Euphausia superba) growth potential
Date (Publication)
2020-12-02
Edition
1
Citation identifier
Dataset DOI

Title
Information and documentation - Digital object identifier system
Date (Publication)
2012-04-23
Citation identifier
ISO 26324:2012

Citation identifier
doi:10.26179/p2e4-5695

Originator

Veytia, D., Kawaguchi, S., Meiners, K.M., Bestley, S. and Corney, S.P.

Publisher

Australian Antarctic Data Centre

Principal investigator

KAWAGUCHI, SO
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Principal investigator

MEINERS, KLAUS MARTIN
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Principal investigator

BESTLEY, SOPHIE
Institute for Marine and Antarctic Studies
20 Castray Esplanade
Battery Point
Tasmania
7004
Australia

Principal investigator

CORNEY, STUART P.
ACE CRC
Private Bag 80
Hobart
Tasmania
7001
Australia

Principal investigator

VEYTIA, DEVI
Institute for Marine and Antarctic Studies
20 Castray Esplanade
Battery Point
Tasmania
7004
Australia

Collaborator

KAWAGUCHI, SO
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Collaborator

VEYTIA, DEVI
Institute for Marine and Antarctic Studies
20 Castray Esplanade
Battery Point
Tasmania
7004
Australia
Name
CAASM Metadata
Website
https://data.aad.gov.au/metadata/records/AAS_4512_Antarctic_krill_growth_potential_projections_1

Purpose
Antarctic krill are an ecologically and commercially important species in the Southern Ocean, and are also likely vulnerable to climate change. Initial habitat quality projections indicate that krill are vulnerable to warming sea surface temperatures (SST). However, krill are also highly sensitive to changes in food availability (mainly phytoplankton, approximated by satellite chlorophyll-a observations), which has yet to be included in habitat quality projections.
Status
Completed

Custodian

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia
Temporal resolution
P90D
Topic category
  • Oceans
  • Biota

Extent

N
S
E
W


Extent

Description
Temporal Coverage

Temporal extent

TimePeriod
1960-01-01 1989-12-31

Extent

Description
Temporal Coverage

Temporal extent

TimePeriod
2070-01-01 2099-12-31
Title
First circumpolar projections of Antarctic krill growth potential
Date (Publication)
2020

Author

Devi Veytia, Stuart Corney, Klaus M. Meiners, So Kawaguchi, Eugene J. Murphy, Sophie Bestley
NASA/GCMD Earth Science Keywords
  • EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > EUPHAUSIIDS (KRILL)
  • EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > USE/FEEDING HABITATS
NASA/GCMD Earth Science Keywords
  • Computer > Computer
NASA/GCMD Earth Science Keywords
  • CLIMATE MODELS
NASA/GCMD Earth Science Keywords
  • AMD/AU
  • CEOS
  • AMD
NASA/GCMD Earth Science Keywords
  • OCEAN > SOUTHERN OCEAN
  • GEOGRAPHIC REGION > POLAR
  • CONTINENT > ANTARCTICA

Resource constraints

Use limitation
This metadata record is publicly available.

Resource constraints

Access constraints
licence
Other constraints
These data are publicly available for download from the provided URL.

Resource constraints

File type
Portable Network Graphic
Linkage
Creative Commons by Attribution logo

Title
Attribution 4.0 International (CC BY 4.0)
Website
https://creativecommons.org/licenses/by/4.0/legalcode

Legal code for Creative Commons by Attribution 4.0 International license

Use constraints
licence
Other constraints
This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4512_Antarctic_krill_growth_potential_projections_1 when using these data.
Language
English
Character encoding
UTF8

Distribution Information

Distributor

Distributor

AU/AADC > Australian Antarctic Data Centre, Australia - AADC, DATA OFFICER (DATA CENTER CONTACT)
Australian Antarctic Division
203 Channel Highway
Kingston
Tasmania
7050
Australia

Distributor

Fees
Free
Planned available datetime
2020-12-02T00:00:00
Units of distribution
MB
Transfer size
2.23
Distribution format
  • NetCDF

OnLine resource
GET DATA > DIRECT DOWNLOAD

Download the dataset.

OnLine resource
PROJECT HOME PAGE

Public information for AAS project AAS_4512

OnLine resource
PROJECT HOME PAGE

Public information for AAS project 4512

OnLine resource
VIEW RELATED INFORMATION

Citation reference for this metadata record and dataset.

Resource lineage

Statement
This dataset represents modeled outputs and therefore problems with data collection do not apply directly. However, the OISST v2, SeaWiFS and Johnson et al. (2013) datasets, which were used for assessing model skill, are based off measurements (of SST or ocean colour, respectively) and analyses that have their own errors associated (see the respective datasets for more information).
Hierarchy level
Dataset
Maintenance and update frequency
As needed
Maintenance note
2020-01-22 - record created by Devi Veytia. 2020-12-02 - record updated by Dave Connell to publicly release the data 2022-04-27 - record updated by Dave Connell for ISO compliance.

Metadata

Metadata identifier
string/AAS_4512_Antarctic_krill_growth_potential_projections_1

Language
English
Character encoding
UTF8

Author

VEYTIA, DEVI
Institute for Marine and Antarctic Studies
20 Castray Esplanade
Battery Point
Tasmania
7004
Australia

Sponsor

Australian Antarctic Division

Owner

AADC

Type of resource

Resource scope
Dataset

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Citation identifier
17173b87-9619-4fcf-97c1-0a5d61ec39c4

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Date (Last Revision)
2022-04-27T15:08:35

Identifier

Description
metadata.extraction_date

Alternative metadata reference

Title
gov.nasa.gsfc.gcmd
Citation identifier
8.6

Metadata linkage
http://data.aad.gov.au/metadata/records/AAS_4512_Antarctic_krill_growth_potential_projections_1

Point of truth for the metadata record

Date info (Creation)
2020-01-22T00:00:00
Date info (Last Update)
2022-04-27

Metadata standard

Title
ISO 19115-3
Edition
2014
Other citation details
Version 1
Title
DIF to ISO 19115-1 Profile
 
 

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