A5033725114- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Climate variability and models
- Climate change and permafrost
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
- Atmospheric chemistry and aerosols
- Nuclear Physics and Applications
- Meteorological Phenomena and Simulations
Finnish Meteorological Institute
2019-2024
Recent advances in satellite observations of methane provide increased opportunities for inverse modeling. However, challenges exist the observation optimization and retrievals high latitudes. In this study, we examine possibilities use total column averaged dry-air mole fractions (XCH4) data over land from TROPOspheric Monitoring Instrument (TROPOMI) on board Sentinel 5 Precursor estimation CH4 fluxes using CarbonTracker Europe-CH4 (CTE-CH4) atmospheric model. We carry out simulations...
The increase in atmospheric greenhouse gas concentrations of CO2 and CH4, due to human activities, is the main driver observed surface temperature by more than 1 °C since pre-industrial era. At 2015 United Nations Climate Change Conference held Paris, most nations agreed reduce emissions limit global 1.5 °C. Satellite remote sensing CH4 now well established thanks missions such as NASA’s OCO-2 Japanese GOSAT missions, which have allowed us build a long-term record GHG from space. They also...
Abstract. Methane emissions from Northern high-latitude wetlands are associated with large uncertainties, especially in the rapidly warming climate. Satellite observations of column-averaged methane concentrations (XCH4) atmosphere exhibit variability due to time-varying sources and sinks. In this study, we investigate how environmental variables, such as temperature, soil moisture, snow cover, hydroxyl radical (OH) sink methane, explain seasonal observed space over wetland areas. We use...
Abstract. Satellite-driven inversions provide valuable information about methane (CH4) fluxes, but the assimilation of total column-averaged dry-air mole fractions CH4 (XCH4) has been challenging. This study explores, for first time, potential new lower tropospheric partial column (pXCH4_LT) GOSAT data, retrieved by Japan Aerospace Exploration Agency (JAXA), to constrain global and regional fluxes. Using CarbonTracker Europe-CH4 atmospheric inverse model, we estimated fluxes between...
The Arctic and boreal regions are experiencing a rapid increase in temperature, resulting changing cryosphere, increasing human activity, potentially high-latitude methane emissions. Satellite observations from Sentinel-5P TROPOMI provide an unprecedented coverage of column-averaged dry-air mole fraction (XCH4) the Arctic, compared to previous missions or situ measurements. purpose this study is support enhance data used for research through presenting systematic evaluation products derived...
Methane ( CH 4) is a potent greenhouse gas with large temporal variability. To increase the spatial coverage, methane observations are increasingly made from satellites that retrieve column-averaged dry air mole fraction of (XCH 4). understand and quantify differences seasonal cycle trend XCH 4 in more detail, to ultimately help reduce uncertainties emissions sinks, we evaluated analyzed average three Greenhouse Gases Observing Satellite (GOSAT) retrieval algorithms: National Institute for...