Data · dataset · 2017
In Situ Carbon Dioxide and Methane Mole Fractions from the Los Angeles Megacity Carbon Project
Listed in CaltechDATA
The Los Angeles Megacity Carbon Project was designed to demonstrate a scientifically robust measurement of multi-year emission trends for carbon dioxide and methane in an urban environment (i.e. megacity) and attribute these trends to emissions from various sectors.
Description
Determination of greenhouse gas fluxes and uncertainties in urban areas is critical for evaluating mitigation strategies. The current LA surface observation network includes twelve in situ analyzers situated on tower- or rooftop/building- based platforms for continuous measurements of carbon dioxide, methane and carbon monoxide (note: not all species are measured at all sites).
The data from the in situ towers are currently being used in both forward and inverse-modeling frameworks and the inverse model results will be used to estimate carbon fluxes for Southern California down to a resolution of 1 km^2. The Hestia project (hestia.project.asu.edu/) has produced a bottom-up, sectorally-resolved inventory estimating fossil carbon emissions for five counties in the South Coast Air Basin, including Los Angeles, with unprecedented space/time resolution.
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The LA Megacity project also includes flask sampling of 14CO2 and other trace gases at three sites. The Caltech site also includes a total carbon column observing network (TCCON, tccon-wiki.caltech.edu/) remote sensing station, a mini-micropulse lidar (mini-MPL, Sigma Space, Inc.,sigmaspace.com/) and ceilometer (Vaisala Instruments, vaisala.com/en/Pages/default.aspx). In addition, the California Laboratory for Atmospheric Remote Sensing (CLARS, tmf.jpl.nasa.gov/clarsweather/) instrument on Mt.
Wilson measures the slant column abundance of greenhouse gases by rastering across the LA basin roughly every 90 minutes. There have also been periodic aircraft sampling of greenhouse gases and meteorological conditions in the Los Angeles megacity during intensive campaigns.
Links
Where it is published
- CaltechDATA record data.caltech.edu/records/8wpz4-kz347 ↗
landing page · from data caltech edu
- DOI doi.org/10.22002/d1.246 ↗
DOI / persistent id · from data caltech edu
Catalogue records · 1
- InvenioRDM API data.caltech.edu/api/records/8wpz4-kz347 ↗
metadata API · from data caltech edu
Topics
- Stated by source
- carbon dioxide · greenhouse gas · in situ · Los Angeles · megacity · methane
- From keywords
- Earth & Environmental Science · Engineering · Greenhouse gases · Humanities · Life Sciences · Methane · Social Science
- Inferred from text
- Climate change science 75% · Satellite remote sensing 65%
Provenance · 1 source records, 21 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| CaltechDATA | 8wpz4-kz347 | 11 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| concepts[field].anzsrc:group:3702 | enrichment · data caltech edu | taxonomy-embedding@1.0.0 | title+keywords+description (75%) |
| concepts[field].local:field:earth-environmental | mapping · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| concepts[field].local:field:engineering | mapping · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| concepts[field].local:field:humanities | mapping · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| concepts[field].local:field:social-science | mapping · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| concepts[modality].local:modality:remote-sensing | enrichment · data caltech edu | keyword-concept-rules@1.0.0 | title+description (65%) |
| concepts[subject].local:topic:greenhouse-gases | mapping · data caltech edu | vocabulary-mapper@1.0.0 | keywords['greenhouse gas'] |
| concepts[subject].local:topic:methane | mapping · data caltech edu | vocabulary-mapper@1.0.0 | keywords['methane'] |
| concepts[topic].invenio_subject:data_caltech_edu:carbon-dioxide | source · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| concepts[topic].invenio_subject:data_caltech_edu:greenhouse-gas | source · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| concepts[topic].invenio_subject:data_caltech_edu:in-situ | source · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| concepts[topic].invenio_subject:data_caltech_edu:los-angeles | source · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| concepts[topic].invenio_subject:data_caltech_edu:megacity | source · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| concepts[topic].invenio_subject:data_caltech_edu:methane | source · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| description | source · data caltech edu | connector:data_caltech_edu@1.0.0 | /metadata/description |
| publication_date | source · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| title | source · data caltech edu | connector:data_caltech_edu@1.0.0 | /metadata/title |
| updated_date | source · data caltech edu | connector:data_caltech_edu@1.0.0 | |
| version_label | source · data caltech edu | connector:data_caltech_edu@1.0.0 |