• Crater Lake in winter.

    Crater Lake

    National Park Oregon

Water-related monitoring

 

Air Temperature

  • daily records from Park Headquarters
    • since 1931
    • temperature (min, max)
  • Rim and Lake weather stations
    • hourly data
    • since 1992
  • Lagoon station
    • hourly data
    • since 1999

Alkalinity

  • manually deployed during summer sampling
  • 11 depths
Ammonia
  • manually deployed during summer sampling
  • 11 depths

Bull Trout Monitoring and Restoration Program

Calcium

  • manually deployed during summer sampling
  • 11 depths

Chloride

Chlorophyll

  • In vitro
    • 17 depths
    • since 1984
  • In situ
    • fluorescence on CTD package
    • since 1999

Conductivity

  • manually deployed during summer sampling
  • 11 depths

Crayfish

Depth

Fish

  • Fish pages
  • annual index of abundance
    • overnight gill nets
    • since 1986
  • annual population and density estimates
    • acoustic surveys
    • from 1997-present
  • fish size, weight, condition, sex
    • gill netted fish
    • 1997-present

Iron

Kjeldahl Nitrogen

  • manually deployed during summer sampling
  • 11 depths

Lake Monitoring

Lake Elevation

Light Penetration

  • using a Spectroradiometer
    • 23 depths
    • since 1996
  • using a Photometer
    • 24 depths
    • between 1978 and 1991

Magnesium

  • manually deployed during summer sampling
  • 11 depths

Newts

  • since 2009
  • visit the Newt pages

Nitrate

  • manually deployed during summer sampling
  • 11 depths

Oxygen

  • manually deployed during summer sampling
  • 11 depths

Particle Density

  • using a Transmissometer on CTD package
    • sub-meter accuracy
    • since 1988

pH

  • manually deployed during summer sampling
  • 11 depths

Phosphorus, total

  • manually deployed during summer sampling
  • 11 depths

Phosphorus, Ortho

  • manually deployed during summer sampling
  • 11 depths

Potassium

  • manually deployed during summer sampling
  • 11 depths

Phytoplankton

  • species
  • density
  • biovolume
  • 17 depths
  • 1981-present

Primary Productivity

  • C14 light/dark bottles
  • 13 depths
  • since 1986, missing data for 1991-1995

Rain

  • from two stations
  • Headquarters, daily accumulation
  • Lagoon station, hourly

Silica

  • manually deployed during summer sampling
  • 11 depths

Springs and Seeps Chemistry

  • 5 springs
  • since 1983
  • pH, alkalinity, conductivity, nitrate, Kjeldahl nitrogen, total Phosphorus, orthophosphate, sulfate, silica, sodium, calcium, magnesium, potassium

Snow

  • from four weather stations
  • Headquarters, daily accumulation
  • Rim, hourly depth
  • Lagoon, hourly depth
  • National Resources Conservation Service SNOTEL, hourly

Sodium

  • manually deployed during summer sampling
  • 11 depths

Sulfate

  • manually deployed during summer sampling
  • 11 depths

Sunlight

  • using pyrometer
  • from Rim weather station
  • since 1999

Water Clarity

  • using a Secchi disk clarity has been measured regularly since 1978
  • first measurement in 1896
  • Water clarity pages

Water Temperature

  • using Seabird CTD package
    • manually deployed during summer sampling
    • sub-meter accuracy
    • since 1988
  • using Thermistors
    • year-round
    • 18 depths
    • since 1992

Weather

  • daily records from Park Headquarters
    • since 1931
    • temperature (min, max), precipitation, snow depth
  • Rim and Lake weather stations
    • hourly data
    • since 1992
    • Both (air temperature, wind speed, wind gust, wind direction)
    • Rim only (barometer, light (pyrometer), humidity, snow depth)
  • Lagoon station
    • hourly data
    • since 1999
    • air temperature, wind speed, wind gust, wind direction, barometer, humidity, snow depth

Zooplankton

  • zooplankton pages
  • species
  • density
  • biomass
  • from 8 vertical tows
  • since 1988

Did You Know?

Did You Know?

The Clarks Nutcracker is frequently seen around the rim of Crater Lake. It feeds almost exclusively on the seeds of the Whitebark Pine. It gathers the seeds and hides some of them to eat later, helping the tree to disperse its seeds. Forgotten seeds may grow into new Whitebark Pines.