Level 1 Studies
   Boniface River Area, Northern Québec, Canada
   Boothia Peninsula, Nunavut, Canada
   Chesapeake Bay, USA
   Columbia Icefield, Canadian Rockies, Canada
   Crête, Central Greenland
   Donard Lake, Cape Dryer Region, Baffin Island, Canada
   Dye-3, Southern Greenland
   Eastern Sierra Nevada Range, California, USA
   Fog Lake, Baffin Island, Canada
   GISP2 Ice Core, Central Greenland
   GISP2 Ice Core, Greenland Summit
   Great Bahama Bank, Straits of Florida
   GRIP Ice Core, Greenland Summit
   Hallet Lake, Alaska, USA
   Iceberg Lake, Alaska, USA
   Jenny Lake, Southwest Yukon Territory, Canada
   Lake 4, Southampton Island, Nunavut, Canada
   Lake Erie, Ohio, USA
   Lake WB02, Northern Victoria Island, Nanavut, Canada
   Lower Murray Lake, Ellesmere Island, Nunavut, Canada
   Moose Lake, Wrangell-St. Elias National Park and Preserve, South-Central Alaska, USA
   Pigmy Basin, Northern Gulf of Mexico
   Upper Fly Lake, Southwest Yukon Territory, Canada

Level 2 Studies
   Blue Hole, Lighthouse Reef, Coast of Belize
   Carmen Basin, Gulf of California
   Cayuga Lake, Central New York, USA
   Chappice Lake, Alberta, Canada
   Columbia Icefield, Canadian Rockies, Canada
   Dog Lake, British Columbia, Canada
   Effingham Inlet, West Coast of Vancouver Island, British Columbia, Canada
   Egedesminde Dyb, South-western Disko Bugt, West Greenland
   Farewell Lake, Alaska, USA
   Greenland Ice Sheet Project Two (GISP2), Central Greenland
   Guaymas Basin, Gulf of California, Mexico
   Hudson River Estuary, USA
   Iceberg Lake, Alaska, USA
   Igaliku Fjord, South Greenland
   Kootenay Valley, Southern Canadian Rockies, Canada
   Kuujjua River Region, Western Victoria Island, Northwest Territories, Canada
   Lake Mina, Minnesota, USA
   Lamar Cave, Yellowstone National Park, Wyoming, USA
   Lily Pond, General Creek Watershed, Sierra Nevada Mountains, California, USA
   Lower Murray Lake, Canada
   Nansen Fjord, Eastern Greenland
   Nebraska Sand Hills, Western North America, USA
   North American Great Plains, USA
   Northern Range of Yellowstone National Park, Wyoming, USA
   Northern Uinta Mountains, Northeastern Utah, USA
   Owens Valley, White Mountains, California, USA
   Pescadero Basin, Gulf of California, Mexico
   Qipisarqo Lake, Southern Greenland
   Raffles Sø, Liverpool Land, East Greenland
   Raffles Sø, Liverpool Land, East Greenland
   Rawson Lake, Northwestern Ontario, Canada
   Royal Basin, Olympic National Park, Washington, USA
   Selwyn Lake, Subarctic Canada
   Sierra Nevada Mountains, California, USA
   South Fork Payette River Area, Central Idaho, USA
   Southern Alaska, USA
   Southern California, USA
   Southwest Greenland
   Tebenkof Glacier, Northern Kenai Mountains, Southern Alaska, USA
   West Greenland Current, Off the West Coast of Greenland

Level 3 Studies
   Aleutian Islands, Alaska, USA
   Alfonso Basin, Gulf of California, Mexico
   Amargosa Canyon, Death Valley, California, USA
   Barrow Strait, Canadian Arctic Archipelago, Canada
   Crevice Lake, Yellowstone National Park, USA
   Disko Bugt, West Greenland
   Elk Island National Park, East-Central Alberta, Canada
   Florida Everglades, USA
   Heal Lake, Southern Vancouver Island, Canada
   Hole Bog, Minnesota, USA
   Hudson Estuary, New York
   Igaliku Fjord, South Greenland
   Lake Chichancanab, Mexico
   Mexican Highlands
   Minden Bog, Michigan, USA
   Moon Lake, North Dakota, USA
   Naja Lake, Lacandon Forest, Chiapas, Mexico
   Nansen Trough, East Greenland Shelf
   Narsaq Sound, Southern Greenland
   Northeastern Portion of Yellowstone National Park, Wyoming, USA
   Owens Lake, East-Central California, USA
   Petaluma Marsh, Northern California, USA
   Pickerel Lake, South Dakota, USA
   Piermont Marsh, New York, USA
   Republican River, Southwest Nebraska, USA
   Shark Rive Slough, Florida Everglades, USA
   Sierra de Manantlan Biosphere Reserve, West-Central Mexico
   Sierra Nevada and White Mountains of California, USA
   South Bay, Near San Francisco, California, USA
   Southern Canadian Tundra, Southwestern Keewatin, Nunavut, Canada
   Southern Sierra Nevada, California, USA
   Steel Lake, North-Central Minnesota, USA
   Upper Gunnison Basin, Colorado, USA
   Western Pacific California Current, USA