Non-CO2 Greenhouse Gases Synthesis Activity
The goal of this activity is to examine the spatial and temporal distributions of methane, carbon monoxide, and nitrous oxide over North America. The activity has the following objectives:
- Develop a comprehensive database in a uniform, accessible format.
- Create a set of bottom-up flux estimates with best possible spatial and temporal resolution, disaggregated by source type.
- Coordinate and undertake top-down validation and improvement of emissions estimates to create a set of synthesis products at various scales from regional to continental, defining emissions of these gases in the NACP domain.
Greenhouse Gases Synthesis Activity, Spatial and Temporal Distributions of Sources for non-CO2 Greenhouse Gases (CH4, CO, N2O) over North America
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Announcement of the non-CO2
Interim Synthesis Data Policy
- AGAGE (2000-2009)
Continuous Tower Data Sets
Advanced Global Atmospheric Gases Experiment (AGAGE), and its predecessors (the Atmospheric Life Experiment, ALE, and the Global Atmospheric Gases Experiment, GAGE) have been measuring the composition of the global atmosphere continuously since 1978. The AGAGE is distinguished by its capability to measure over the globe at high frequency almost all of the important gases species in the Montreal Protocol (e.g. CFCs and HCFCs) to protect the ozone layer and almost all of the significant non-CO2 gases in the Kyoto Protocol (e.g. HFCs, methane, and nitrous oxide) to mitigate climate change.
- CSIRO Gaslab Flask Data
The CSIRO flask study presents data from 1984 to 2001, based at 9
stationary surface sites and one moving platform. These stations span
the globe, but there are three sites of interest for North America:
- Alert, Canada - ALT (82.45°, -62.51°, 6 masl)
- Mauna Loa, HI - MLO (19.54°, -155.58°, 3397 masl)
- Estevan Point, Canada - ESP (49.58°, -126.37°, 39 masl)
The study traces four crucial gases, CH4, CO2, CO, and H2, with a number of daily flask samples each week.
- COBRA (2003-2004)
Continuous and Flask Aircraft Data
The objective of COBRA is to test concepts for observations and data assimilation to determine the large scale sources and sinks of greenhouse gases and ozone-destroying gases from North America. The study will cover spatial scales from regional to continental. Gases of interest include CO2, CO, CH4, N2O, chlorofluorcarbons (CFCs), chlorinated solvents (CH3CCl3, CCl4 ), SF6, ozone (O3), and molecular hydrogen (H2).
README (Flask 2003)
- Environment Canada (2000-2008)
Continuous and Flask Tower Data
These data sets report methane (CH4) and carbon dioxide (CO2) mixing ratios collected at seven stations in Canada between 2000 and 2008.
- INTEX-NA 2004/2006
Continuous and Flask Aircraft Data
INTEX-NA is an integrated atmospheric field experiment consisting of two phases. Phase A (INTEX-A) occurred in the summer of 2004 over the central and
eastern United States; Phase B (INTEX-B) occurred in the summer of 2006 over the west coast and out in the pacific region toward Asia. The INTEX-NA mission seeks to answer questions about the transport and transformation of gases and aerosols on transcontinental /intercontinental scales and their impact on air qualirty and climate.
README C-130 (continuous)
README C-130 (flask)
README DC8 (continuous)
README DC8 (flask)
- Irvine Latitude Network Flask Data
(2000 - 2008)
The Irvine Latitude Network investigates the presence of methane,
other hydrocarbons, alkyl nitrates, and chlorinated carbon compounds
throughout the world. The network has an approximate latitudinal
range of ~ -47 to 71 degrees, spanning 45 sampling locations. The
network takes roughly 80 samples per season over three-week periods
in March, June, September, and December.
- NOAA Continuous and Flask Data
The general mission of the Halocarbons and other Atmospheric Trace Species (HATS) group is to quantify the distributions and magnitudes of sources and sinks for atmospheric nitrous oxide (N2O) and halogen containing compounds. These data represent in-situ measurements from three of NOAA's ground-based stations (Pt. Barrow, AK, Niwot Ridge, CO, and Mauna Loa, HI). Note that the CH4 and CO2 measurements are only from Pt. Barrow, AK and Mauna Loa, HI.
NOAA flask data provide measurements of eight species (CH4, N2O, CO, CO2, (C13, C14, O18), H2), drawing samples from ground-based sites as well as aircraft.
- SCRIPPS CO2 Flask Data
This study presents CO2 concentrations
spanning latitudes 82° N to 90° S, although only North American data is
included here. The five stations of interest are:
- Barrow, AK (71.32°, -156.6°, 11 masl)
- Mauna Loa, HI (19.53°, -155.58°, 3397 masl)
- Cape Kumukahi, HI (19.52°, -154.49°, 3 masl)
- La Jolla Pier, CA (32.15°, -117.05°, 10 masl)
- Alert, NWT, Canada (82.47°, -62,5°, 210 masl)
- Stanley C. Tyler UCI Flask Data
This project records flask data from two North American sites,
Niwot Ridge, CO (NWR) and Montana de Oro National Park (MDO). The sampling
sites are at (40.05, -105.58) and (35, -121) respectively. Air samples
have been collected from both sites since the mid-1990's at semi-monthly
to monthly intervals in order to provide time series. Such time series
can provide information about: (1) seasonal cycling of CO,
CO2, and CH4
sources and sinks in background air, (2) trends in atmospheric concentrations
of CO2, and
CH4 and their stable carbon, oxygen,
and hydrogen isotopes, (3) the distribution of the
hydroxyl (OH) radical in the atmosphere, and (4) the role of the
terrestrial biosphere as a source or sink of atmospheric CO2.
- Email Steve Wofsy
- Other contacts include Janusz Eluszkiewicz and Arlyn Andrews