• Wizard Island

    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?

Visitors viewing Crater Lake from the Sinnott Memorial.

An average of 482,000 people visit Crater Lake National Park each year. Open year-round, less than 100,000 people visit the park during the non-summer months.