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Dataset

 

Top‐down isoprene emissions over tropical South America inferred from SCIAMACHY and OMI formaldehyde columns: High-Resolution Chemistry Model Simulations and Analysis

Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2015-12-19
Download Stats: last 12 months

Abstract

The Quantifying the Amazon Isoprene Budget: Reconciling Top-down versus Bottom-up Emission Estimates project produced a unique high resolution model (GEOS-Chem version v8-03-01 - with modifications) for the Amazon, which simulated isoprene emissions and atmospheric chemistry.

Formaldehyde (HCHO) vertical column measurements from the Scanning
Imaging Absorption spectrometer for Atmospheric Cartography (SCIAMACHY) and
Ozone Monitoring Instrument (OMI), and a nested-grid version of the GEOS-Chem
chemistry transport model, are used to infer an ensemble of top-down isoprene emission estimates
from tropical South America during 2006, using different model configurations and
assumptions in the HCHO air-mass factor (AMF) calculation. Scenes affected by biomass
burning are removed on a daily basis using fire count observations, and the local
model sensitivity was used to identify locations where the impact of spatial smearing is small,
though this comprises spatial coverage over the region

Results of this project are presented in the following publication:

Barkley, M. P., et al. (2013), Top-down isoprene emissions over tropical South America inferred from SCIAMACHY and OMI formaldehyde columns, J. Geophys. Res. Atmos., 118, 6849–6868, doi:10.1002/jgrd.5055

and model outputs associated to this project are archived at CEDA.

This was a NERC funded project.

Citable as:  Barkley, M. (2015): Top‐down isoprene emissions over tropical South America inferred from SCIAMACHY and OMI formaldehyde columns: High-Resolution Chemistry Model Simulations and Analysis. NCAS British Atmospheric Data Centre, date of citation. https://catalogue.ceda.ac.uk/uuid/4c810bfa53d14595a87a6e0eeb9c6d7d
Abbreviation: rm2010_amazon_isoprene-2013
Keywords: amazon, isoprene, HCHO, AMF, GEOS-Chem, NERC

Details

Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
Use of these data is covered by the following licence: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data provided as is by M. Barkley in March 2015.

File Format:
Typically GEOS-Chem binary-punch outputs *.bpch. Other files are straight binary ending in *.bin.

Process overview

This dataset was generated by the computation detailed below.
Title Quantifying the Amazon Isoprene Budget: GEOS-Chem Chemistry Transport Model
Abstract GEOS-Chem Chemistry Transport Model. The nest-grid has a horizontal resolution of 0.667° × 0.5° (longitude × latitude), and 47 vertical levels extending from the surface to 0.01 hPa. The model is driven using GEOS-5 meteorology, which is updated every 3–6 hours. Tracer mixing ratios from an off-line global 4° × 5° simulation provide 3-hourly boundary conditions to the grid-edges. Based on a previous model evaluation [Barkley et al., 2011], we use an updated chemical mechanism to simulate O3-NOx-VOC-aerosol photochemistry.
Input Description None
Output Description None
Software Reference None
  • long_name: Isoprene
  • names: Isoprene

Co-ordinate Variables

Coverage
Temporal Range
Start time:
2006-01-01T00:00:00
End time:
2006-12-31T00:00:00
Geographic Extent

 
14.0000°
 
-85.0000°
 
-30.0000°
 
-25.0000°