Ocean Acidification Product Suite

Metadata also available as - [Outline] - [Parseable text] - [XML]

Frequently anticipated questions:

What does this data set describe?

Title: Ocean Acidification Product Suite
Abstract:
Scientists within the ACCRETE (Acidification, Climate, and Coral Reef Ecosystems Team) Lab of AOML_s Ocean Chemistry and Ecosystems Division (OCED) have constructed a tool to monitor ocean acidification over the wider Caribbean and Gulf of Mexico. This tool utilizes satellite data and a data-assimilative hybrid model to map the components of the carbonate system of surface water. This effort represents an update to the experimental Ocean Acidification Product Suite (OAPS) developed by Coral Reef Watch (http://coralreefwatch.noaa.gov/satellite/oa/index.php). To resolve the seawater carbonic acid system, we use the partial pressure of CO2 (pCO2) and pH. Surface pCO2 is approximated by taking total tropospheric column CO2 from the AIRS mid-tropospheric CO2 and AMSU instruments on board the Aqua satellite (http://disc.sci.gsfc.nasa.gov/AIRS/data-holdings/by-data-product-v5/AIRX3C2M) and adjusting it for the marine boundary layer by replacing the annual cycle of the observed AIRS data with that from the NOAA Marine Boundary Layer (http://www.esrl.noaa.gov/gmd/ccgg/mbl/). Following this adjustment, seawater pCO2 is estimated using an empirical model relating the differential between sea surface and atmospheric CO2 partial pressure to changes in CO2 gas solubility (K0). Total alkalinity (TA) is calculated using the Subtropical/Tropical algorithm from Lee et al. (2006). Sea surface temperature is derived from an optimal interpolated product at 9km resolution (http://www.remss.com/measurements/sea-surface-temperature/oisst-description) and salinity is obtained from a data-assimilative hybrid model (HYCOM https://hycom.org/). These measurements, together with pCO2 and TA, allow calculation the complete carbonate system. Data are updated monthly at a 9km resolution. Initial results indicate good agreement with observed values from cruises and MAPCO2 buoys, but further testing and refinement of algorithms is planned.
  1. How might this data set be cited?
    NOAA AOML OCED ACCRETE (Acidification, Climate, and Coral Reef Ecosystems Team), 20141001, Ocean Acidification Product Suite: NOAA AOML, Miami, Florida, USA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -95.0
    East_Bounding_Coordinate: -60.0
    North_Bounding_Coordinate: 30.0
    South_Bounding_Coordinate: 14.0
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 01-Jan-2014
    Ending_Date: Present
    Currentness_Reference: ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: remote sensing image, webpage
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Raster data set. It contains the following raster data types:
      • Dimensions 182 x 398, type Grid Cell
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.087890625. Longitudes are given to the nearest 0.087890625. Latitude and longitude values are specified in Decimal degrees.
  7. How does the data set describe geographic features?
    Ocean Acidification Product Suite
    Ocean acidification product suite maps the components of the carbonate system of surface water. (Source: AOML)
    pH
    pH of surface water (Source: AOML) Variable. Values change with each run of the model
    spCO2
    surface pressure of CO2 in Pascal (Source: AOML) Variable. Values change with each run of the model
    Total alkalinity
    total alkalinity in µmol/kg (Source: AOML) Variable. Values change with each run of the model
    omega arag
    aragonite saturation state (Source: AOML) Variable. Values change with each run of the model
    omega calc
    calcite saturation state (Source: AOML) Variable. Values change with each run of the model

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    NOAA AOML OCED
    Attn: Dr. Ruben van Hooidonk
    NOAA, AOML, 4301 Rickenbacker causeway
    Miami, Florida
    USA

    305-361-4524 (voice)
    ruben.van.hooidonk@noaa.gov

Why was the data set created?

The Ocean Acidification Product Suite enables monitoring of ocean acidification in the wider Caribbean and can be used to supplement in-situ data for verification and construction of longer time series of ocean acidification parameters.

How was the data set created?

  1. From what previous works were the data drawn?
    AIRS (source 1 of 1)
    NASA, 2014, AIRS/Aqua Level 3, monthly, CO2 in the free troposphere (AIRS+AMSU).

    Type_of_Source_Media: data file
    Source_Contribution:
    CO2 data from troposphere was used to estimate CO2 in the marine boundary layer.
  2. How were the data generated, processed, and modified?
    Date: Not complete (process 1 of 1)
    Surface pCO2 is approximated by taking total tropospheric column CO2 from the AIRS mid-tropospheric CO2 and AMSU instruments on board the Aqua satellite (http://disc.sci.gsfc.nasa.gov/AIRS/data-holdings/by-data-product-v5/AIRX3C2M) and adjusting it for the marine boundary layer by replacing the annual cycle of the observed AIRS data with that from the NOAA Marine Boundary Layer (http://www.esrl.noaa.gov/gmd/ccgg/mbl/). Following this adjustment, seawater pCO2 is estimated using an empirical model relating the differential between sea surface and atmospheric CO2 partial pressure to changes in CO2 gas solubility (K0). Total alkalinity (TA) is calculated using the Subtropical/Tropical algorithm from Lee et al. (2006). Sea surface temperature is derived from an optimal interpolated product at 9km resolution (http://www.remss.com/measurements/sea-surface-temperature/oisst-description) and salinity is obtained from a data-assimilative hybrid model (HYCOM https://hycom.org/). These measurements, together with pCO2 and TA, allow calculation the complete carbonate system.
  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    Validation of these experimental products are underway. Caution should be used near coasts and especially near river outflows.
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    There is no spatial data gap existing in this data set. Because this is currently an experimental product undergoing research and development, revisions to the product are anticipated. The near-real-time ocean acidification monitoring product will be updated.
  5. How consistent are the relationships among the observations, including topology?
    none

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: none
Use_Constraints: Not intended for legal use. Data may contain inaccuracies.
  1. Who distributes the data set? (Distributor 1 of 1)
    NOAA AOML OCED Accrete
    Attn: Ruben van Hooidonk
    NOAA, AOML, 4301 Rickenbacker causeway
    Miami, Florida
    USA

    305-361-4524 (voice)
    ruben.van.hooidonk@noaa.gov
  2. What's the catalog number I need to order this data set? Downloadable Data
  3. What legal disclaimers am I supposed to read?
    NOAA makes no warranty regarding these data and images, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA cannot assume liability for any damages caused by any errors or omissions in these images, nor as a result of the failure of these data to function on a particular system.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 29-Mar-2020
Metadata author:
NOAA AOML OCED Accrete
Attn: Ruben van Hooidonk
NOAA, AOML, 4301 Rickenbacker causeway
Miami, Florida
USA

305-361-4524 (voice)
ruben.van.hooidonk@noaa.gov
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Generated by mp version 2.9.48 on Wed Apr 24 10:41:02 2024