Infographic showing how stormwater provides underwater caves with an influx of oxygen that is critical to supporting microorganisms—an integral part of the food web—and limiting the release of harmful greenhouse gases into the ocean and atmosphere.
John Pohlman, PhD
John Pohlman is a Research Chemist with the Woods Hole Coastal and Marine Science Center Gas Hydrates Project.
Science and Products
U.S. Geological Survey Gas Hydrates Project
The USGS Gas Hydrates Project has been making contributions to advance understanding of US and international gas hydrates science for at least three decades. The research group working on gas hydrates at the USGS is among the largest in the US and has expertise in all the major geoscience disciplines, as well as in the physics and chemistry of gas hydrates, the geotechnical properties of hydrate...
Gas Hydrates-Environment Interactions
The USGS Gas Hydrates Project focuses on the study of natural gas hydrates in deepwater marine systems and permafrost areas. Breakdown of gas hydrates due to short- or long-term warming may release methane to the ocean-atmosphere system. As a potent greenhouse gas, methane plays a role in climate warming.
Gas Hydrates - Primer
What is Gas Hydrate? Gas hydrate is an ice-like crystalline form of water and low molecular weight gas (e.g., methane, ethane, carbon dioxide). On Earth, gas hydrates occur naturally in some marine sediments and within and beneath permafrost. Gas hydrates have also been inferred on other planets or their moons.
Ox Bel Ha Infographic - English Version
Infographic showing how stormwater provides underwater caves with an influx of oxygen that is critical to supporting microorganisms—an integral part of the food web—and limiting the release of harmful greenhouse gases into the ocean and atmosphere.
Ox Bel Ha Infographic - Spanish version
Infographic showing how stormwater provides underwater caves with an influx of oxygen that is critical to supporting microorganisms—an integral part of the food web—and limiting the release of harmful greenhouse gases into the ocean and atmosphere.
Infographic showing how stormwater provides underwater caves with an influx of oxygen that is critical to supporting microorganisms—an integral part of the food web—and limiting the release of harmful greenhouse gases into the ocean and atmosphere.
Chesapeake Bay 2022 Cruise Logo
The USGS and the University of Maryland’s Chesapeake Biological Laboratory conducted a study in the Chesapeake Bay to quantify greenhouse gas fluxes from the largest estuary in the U.S.
The USGS and the University of Maryland’s Chesapeake Biological Laboratory conducted a study in the Chesapeake Bay to quantify greenhouse gas fluxes from the largest estuary in the U.S.
Gas Hydrates Lab Sites
The USGS Gas Hydrates Project analyzes the sediments that make up gas hydrate reservoirs in the Physical Properties Laboratory and manages the standalone Hydrate Pressure Core Analysis Laboratory (HyPrCAL) at the Woods Hole Coastal and Marine Science Center (WHCMSC) to study hydrate-bearing sediments in support of energy resources and geohazards research.
The USGS Gas Hydrates Project analyzes the sediments that make up gas hydrate reservoirs in the Physical Properties Laboratory and manages the standalone Hydrate Pressure Core Analysis Laboratory (HyPrCAL) at the Woods Hole Coastal and Marine Science Center (WHCMSC) to study hydrate-bearing sediments in support of energy resources and geohazards research.
Gas Hydrates Biogeochemistry Laboratory
Gas Hydrates Biogeochemistry Laboratory equipment and program staff.
Gas Hydrates Biogeochemistry Laboratory equipment and program staff.
Part of the Akumal Coastline
Part of the Akumal coastline in Quintana Roo, Mexico, near where the Ox Bel Ha cave system is located.
Part of the Akumal coastline in Quintana Roo, Mexico, near where the Ox Bel Ha cave system is located.
USGS in the Yucatan Peninsula, Mexico
John Pohlman (USGS), David Brankovits (USGS/WHOI) and Jake Emmert (MG) deploy acoustic devices in open water sinkhole (or cenote) prior to a 6-month long installation in the Yucatan Peninsula, Mexico cave
John Pohlman (USGS), David Brankovits (USGS/WHOI) and Jake Emmert (MG) deploy acoustic devices in open water sinkhole (or cenote) prior to a 6-month long installation in the Yucatan Peninsula, Mexico cave
Science and Products
U.S. Geological Survey Gas Hydrates Project
The USGS Gas Hydrates Project has been making contributions to advance understanding of US and international gas hydrates science for at least three decades. The research group working on gas hydrates at the USGS is among the largest in the US and has expertise in all the major geoscience disciplines, as well as in the physics and chemistry of gas hydrates, the geotechnical properties of hydrate...
Gas Hydrates-Environment Interactions
The USGS Gas Hydrates Project focuses on the study of natural gas hydrates in deepwater marine systems and permafrost areas. Breakdown of gas hydrates due to short- or long-term warming may release methane to the ocean-atmosphere system. As a potent greenhouse gas, methane plays a role in climate warming.
Gas Hydrates - Primer
What is Gas Hydrate? Gas hydrate is an ice-like crystalline form of water and low molecular weight gas (e.g., methane, ethane, carbon dioxide). On Earth, gas hydrates occur naturally in some marine sediments and within and beneath permafrost. Gas hydrates have also been inferred on other planets or their moons.
Ox Bel Ha Infographic - English Version
Infographic showing how stormwater provides underwater caves with an influx of oxygen that is critical to supporting microorganisms—an integral part of the food web—and limiting the release of harmful greenhouse gases into the ocean and atmosphere.
Infographic showing how stormwater provides underwater caves with an influx of oxygen that is critical to supporting microorganisms—an integral part of the food web—and limiting the release of harmful greenhouse gases into the ocean and atmosphere.
Ox Bel Ha Infographic - Spanish version
Infographic showing how stormwater provides underwater caves with an influx of oxygen that is critical to supporting microorganisms—an integral part of the food web—and limiting the release of harmful greenhouse gases into the ocean and atmosphere.
Infographic showing how stormwater provides underwater caves with an influx of oxygen that is critical to supporting microorganisms—an integral part of the food web—and limiting the release of harmful greenhouse gases into the ocean and atmosphere.
Chesapeake Bay 2022 Cruise Logo
The USGS and the University of Maryland’s Chesapeake Biological Laboratory conducted a study in the Chesapeake Bay to quantify greenhouse gas fluxes from the largest estuary in the U.S.
The USGS and the University of Maryland’s Chesapeake Biological Laboratory conducted a study in the Chesapeake Bay to quantify greenhouse gas fluxes from the largest estuary in the U.S.
Gas Hydrates Lab Sites
The USGS Gas Hydrates Project analyzes the sediments that make up gas hydrate reservoirs in the Physical Properties Laboratory and manages the standalone Hydrate Pressure Core Analysis Laboratory (HyPrCAL) at the Woods Hole Coastal and Marine Science Center (WHCMSC) to study hydrate-bearing sediments in support of energy resources and geohazards research.
The USGS Gas Hydrates Project analyzes the sediments that make up gas hydrate reservoirs in the Physical Properties Laboratory and manages the standalone Hydrate Pressure Core Analysis Laboratory (HyPrCAL) at the Woods Hole Coastal and Marine Science Center (WHCMSC) to study hydrate-bearing sediments in support of energy resources and geohazards research.
Gas Hydrates Biogeochemistry Laboratory
Gas Hydrates Biogeochemistry Laboratory equipment and program staff.
Gas Hydrates Biogeochemistry Laboratory equipment and program staff.
Part of the Akumal Coastline
Part of the Akumal coastline in Quintana Roo, Mexico, near where the Ox Bel Ha cave system is located.
Part of the Akumal coastline in Quintana Roo, Mexico, near where the Ox Bel Ha cave system is located.
USGS in the Yucatan Peninsula, Mexico
John Pohlman (USGS), David Brankovits (USGS/WHOI) and Jake Emmert (MG) deploy acoustic devices in open water sinkhole (or cenote) prior to a 6-month long installation in the Yucatan Peninsula, Mexico cave
John Pohlman (USGS), David Brankovits (USGS/WHOI) and Jake Emmert (MG) deploy acoustic devices in open water sinkhole (or cenote) prior to a 6-month long installation in the Yucatan Peninsula, Mexico cave