Data Variable, Units, and Definitions

 

Variable

Units

Definition

Observation Number

integer

An identification code referencing the observer of the data

Is GLOBE Trained

1 = true
0 = false

Indicates if the observer did a GLOBE training to make observations

Is Citizen Science

1 = true
0 = false

Indicates if the observer used the GLOBE Observer app to collect the observation

Site ID

integer

An identification code referencing the location of the observation

Observation Latitude

decimal degrees north

The latitude of the site where data were observed. Range [-90, 90]

Observation Longitude

decimal degrees east

The longitude of the site where date were observed.  Range [-180, 180]

Observation Elevation

meters above sea level

The elevation of the site where data were observed

Measurement Date (UTC)

YYYY-MM-DD

The date when the data were observed in Coordinated Universal Time (UTC)

Measurement Time (UTC)

HH:MM:SS

The time when the data were observed in Coordinated Universal Time (UTC)

Sky Color

text or -99

Sky color: deep blue, blue, light blue, pale blue, milky or -99 (not reported)

Sky Visibility

text or -99

Sky visibility: unusually clear, clear, somewhat hazy, very hazy, extremely hazy or -99 (not reported)

Total Cloud Cover

text or -99

Total amount of sky covered by clouds irregardless of altitude : none, clear, isolated, scattered, broken, overcast, obscured or -99 (no report)

Total Cloud Cover %

text or -99

Total percent of sky covered by clouds irregardless of altitude : 0, <10%, 10-25%, 25-50%, 50-90%, 90-100% or -99 (no report or sky obscured)

Cirrus

1 = true
0 = false

Cirrus clouds detected

Cirrocumulus

1 = true
0 = false

Cirrocumulus clouds detected

Cirrostratus

1 = true
0 = false

Cirrostratus clouds detected

Altostratus

1 = true
0 = false

Altostratus clouds detected

Altocumulus

1 = true
0 = false

Altocumulus clouds detected

Cumulus

1 = true
0 = false

Cumulus clouds detected

Nimbostratus

1 = true
0 = false

Nimbostratus clouds detected

Stratus

1 = true
0 = false

Stratus clouds detected

Stratocumulus

1 = true
0 = false

Stratocumulus clouds detected

Cumulonimbus

1 = true
0 = false

Cumulonimbus clouds detected

Short Lived Contrails

integer

Number of short-lived contrails observed (-99 not reported)

Spreading Contrails

integer

Number of spreading contrails observed (-99 not reported)

Non Spreading Contrails

integer

Number of non-spreading contrails observed (-99 not reported)

Fog

1 = true
0 = false

Fog obscured at least 25% of the sky

Smoke

1 = true
0 = false

Smoke obscured at least 25% of the sky

Haze

1 = true
0 = false

Haze obscured at least 25% of the sky

Volcanic Ash

1 = true
0 = false

Volcanic Ash obscured at least 25% of the sky

Dust

1 = true
0 = false

Dust obscured at least 25% of the sky

Sand

1 = true
0 = false

Sand obscured at least 25% of the sky

Spray

1 = true
0 = false

Spray obscured at least 25% of the sky

Heavy Rain

1 = true
0 = false

Heavy rain obscured at least 25% of the sky

Heavy Snow

1 = true
0 = false

Heavy snow obscured at least 25% of the sky

Blowing Snow

1 = true
0 = false

Blowing snow obscured at least 25% of the sky

Surface Snow/Ice

1 = true
0 = false

Snow or ice covered the ground

Surface Standing Water

1 = true
0 = false

Body of water present in location of observation

Surface Muddy

1 = true
0 = false

Mud present on the ground

Surface Dry Ground

1 = true
0 = false

Ground reported as dry

Surface Leaves on Trees

1 = true
0 = false

More than 50% of trees have leaves

Surface Raining or Snowing

1 = true
0 = false

The observation was made while it rained/snowed

High Cloud Cover

text or -99

Total amount of sky covered by high clouds irregardless of altitude : clear (<10%), isolated (10-25%), scattered (25-50%), broken (50-90%), overcast (90-100%), -99 (not reported or none)

High Cloud Opacity

text or -99

Average opacity of high clouds : transparent, translucent, opaque, -99 (not reported or none)

Mid Cloud Cover

text or -99

Total amount of sky covered by mid clouds irregardless of altitude : clear (<10%), isolated (10-25%), scattered (25-50%), broken (50-90%), overcast (90-100%), -99 (not reported or none)

Mid Cloud Opacity

text or -99

Average opacity of high clouds : transparent, translucent, opaque, -99 (not reported or none)

Low Cloud Cover

text or -99

Total amount of sky covered by low clouds irregardless of altitude : clear (<10%), isolated (10-25%), scattered (25-50%), broken (50-90%), overcast (90-100%), -99 (not reported or none)

Low Cloud Opacity

text or -99

Average opacity of high clouds : transparent, translucent, opaque, -99 (not reported or none)

Surface Air Temperature

degrees or -99

The ambient air temperature in Celsius at the time of measurement or -99 (not reported)

Surface Barometric Pressure

millibars (mb) or -99

Atmospheric pressure at the measurement site or -99 (not reported)

Surface Relative Humidity %

percent % or -99

Relative humidity, -99 (not reported)

Ground Image North

link or -99

URL link to image taken in the north cardinal direction or -99 (photo not provided)

Ground Image East

link or -99

URL link to image taken in the east cardinal direction or -99 (photo not provided)

Ground Image South

link or -99

URL link to image taken in the south cardinal direction or -99 (photo not provided)

Ground Image West

link or -99

URL link to image taken in the west cardinal direction or -99 (photo not provided)

Ground Image Up

link or -99

URL link to image taken in the upward direction or -99 (photo not provided)

Ground Image Down

link or -99

URL link to image taken of the ground or -99 (photo not provided)

GEO/Aqua/Terra  Satellite Match Table

link or text

URL link to the satellite match table or no match

CALIPSO  Satellite Match Table

link or text

URL link to the satellite match table or no match

GEO Satellite

text or -99

Geostationary satellite collocated or matched to citizen science observation, -99 (no match)

GEO Date

YYYY-MM-DD or -99

Date of geostationary satellite data collocated or matched to citizen science observation, -99 (no match)

GEO Time

HH:MM:SS or -99

Time of geostationary satellite data collocated or matched to citizen science observation, -99 (no match)

GEO Latitude

degrees or -99

Latitude of the geostationary satellite relative to earth (always zero), -99 (no match)

GEO Longitude

degrees or -99

Longitude of the geostationary satellite relative to earth, -99 (no match)

GEO Vzen

degrees or -99

Satellite solar view zenith angle, -99 (no match)

GEO Szen

degrees or -99

Satellite solar zenith angle, -99 (no match)

GEO Total Cloud Cover

percent % or -99

Total cloud cover, -99 (no match)

GEO Low Cloud Cover

percent % or -99

Total cloud cover of low clouds (0-2km), -99 (no match)

GEO Mid Cloud Cover

percent % or -99

Total cloud cover of mid clouds (2-6km), -99 (no match)

GEO High Cloud Cover

percent % or -99

Total cloud cover of high clouds (>6km), -99 (no match)

GEO Low Liquid

percent % or -99

Percent of clouds surrounding the site (out to 40-km away) with a liquid phase and cloud top height between 0-2 km, -99 (no match)

GEO Mid Liquid

percent % or -99

Percent of clouds surrounding the site (out to 40-km away) with a liquid phase and cloud top height between 2-6 km, -99 (no match)

GEO High Liquid

percent % or -99

Percent of clouds surrounding the site (out to 40-km away) with a liquid phase and cloud top height above 6 km, -99 (no match)

GEO Low Ice

percent % or -99

Percent of clouds surrounding the site (out to 40-km away) with ice and cloud top height between 0-2 km, -99 (no match)

GEO Mid Ice

percent % or -99

Percent of clouds surrounding the site (out to 40-km away) with ice phase and cloud top height between 2-6 km, -99 (no match)

GEO High Ice

percent % or -99

Percent of clouds surrounding the site (out to 40-km away) with ice phase and cloud top height above 6 km, -99 (no match)

GEO Low Opt

number or -99

Optical depth for cloud top heights between 0-2km, -99 (no match)

GEO Mid Opt

number or -99

Optical depth for cloud top heights between 2-6km, -99 (no match)

GEO High Opt

number or -99

Optical depth for cloud top heights above 6km

GEO Low Cloud  Temp

Kelvin or -99

Effective temperature (K) for clouds with tops between 0-2km, -99 (no match)

GEO Mid Coud Temp

Kelvin or -99

Effective temperature (K) for clouds with tops between 2-6km, -99 (no match)

GEO High Cloud Temp

Kelvin or -99

Effective temperature (K) for clouds with tops above 6km, -99 (no match)

GEO Low Cloud Altitude

Kilometers or -99

Cloud top altitude (km) for clouds with tops between 0-2km, -99 (no match)

GEO Mid Cloud Altitude

Kilometers or -99

Cloud top altitude (km) for clouds with tops between 2-6km, -99 (no match)

GEO High Cloud Altitude

Kilometers or -99

Cloud top altitude (km) for clouds with tops above 6km, -99 (no match)

GEO Snow

percent % or -99

Percent snow and ice cover, -99 (no match)

GEO Ocean

percent %

Percent surface water, -99 (no match)

Terra Satellite

Text or -99

Text appears if data was collocated with the CERES instrument onboard Terra, -99 (no match)

Terra Longitude

degrees or -99

Longitude of satellite at time of observation, -99 (no match)

Terra Latitude

degrees or -99

Latitude of satellite at time of observation, -99 (no match)

Terra Date

YYYY-MM-DD or -99

Date CERES instrument onboard Terra satellite collocated or matched to citizen science observation, -99 (no match)

Terra Time

HH:MM:SS or -99

Time CERES instrument onboard Terra satellite collocated or matched to citizen science observation, -99 (no match)

Terra Total Cloud Cover

percent % or -99

Total cloud cover, -99 (no match)

Terra Low Cloud Altitude

Kilometers or -99

Cloud top height (km) for clouds with tops between 0-2km, -99 (no match)

Terra Low Cloud Opt

number or -99

Optical depth for cloud top heights between 0-2km, -99 (no match)

Terra Low Cloud Cover

percent % or -99

Total cloud cover of low clouds (0-2km), -99 (no match)

Terra Low Cloud Phase

integer or -99

Mean cloud particle phase (liquid, mix, ice) for cloud top heights between 0-2km. A particle phase of 1.0 means the entire cloud is water. A particle phase of 2.0 means the entire cloud is ice, -99 (no match)

Terra Low Cloud Temp (K)

Kelvin or -99

Effective temperature (K) for clouds with tops between 0-2km, -99 (no match)

Terra Mid Cloud Altitude

Kilometers or -99

Cloud top height (km) for clouds with tops between 2-6km, -99 (no match)

Terra Mid Cloud Opt

number or -99

Optical depth for cloud top heights between 2-6km, -99 (no match)

Terra Mid Cloud Cover

percent % or -99

Total cloud cover of mid level clouds (2-6km), -99 (no match)

Terra Mid Cloud Phase

integer or -99

Mean cloud particle phase (liquid, mix, ice) for cloud top heights between 2-6km. A particle phase of 1.0 means the entire cloud is water. A particle phase of 2.0 means the entire cloud is ice, -99 (no match)

Terra Mid Cloud Temp (K)

Kelvin or -99

Effective temperature (K) for clouds with tops between 2-6km, -99 (no match)

Terra High Cloud Altitude

Kilometers or -99

Cloud top height (km) for clouds with tops above 6km, -99 (no match)

Terra High Cloud Opt

number or -99

Optical depth for cloud top heights above 6km, -99 (no match)

Terra High Cloud Cover

percent % or -99

Total cloud cover of high clouds (> 6km), -99 (no match)

Terra High Cloud Phase

integer or -99

Mean cloud particle phase (liquid, mix, ice) for cloud top heights above 6km. A particle phase of 1.0 means the entire cloud is water. A particle phase of 2.0 means the entire cloud is ice, -99 (no match)

Terra High Cloud Temp (K)

Kelvin or -99

Effective temperature (K) for clouds with tops above 6km, -99 (no match)

Terra Vzen

degrees or -99

Satellite solar view zenith angle, -99 (no match)

Terra Szen

degrees or -99

Satellite solar zenith angle, -99 (no match)

Terra Wind

Meters per seconds (m/s) or -99

Surface wind speed (at 10 m altitude) calculated using u and v vectors based on modeled data (see SSF-57 and SSF-58 - https://ceres.larc.nasa.gov/documents/collect_guide/pdf/SSF_CG_R2V1.pdf), -99 (no match)

Terra Snow

Percent (%) or -99

Percent snow and ice cover, -99 (no match)

Terra Ocean

Percent (%) or -99

Percent surface water, -99 (no match)

Aqua Satellite

Text or -99

Text appears if data was collocated the CERES instrument onboard Aqua, -99 (no match)

Aqua Longitude

degrees or -99

Longitude of satellite at time of observation, -99 (no match)

Aqua Latitude

degrees or -99

Latitude of satellite at time of observation, -99 (no match)

Aqua Date

YYYY-MM-DD or -99

Date CERES instrument onboard Aqua satellite collocated or matched to citizen science observation, -99 (no match)

Aqua Time

HH:MM:SS or -99

Time CERES instrument onboard Aqua satellite collocated or matched to citizen science observation, -99 (no match)

Aqua Total Cloud Cover

percent % or -99

Total cloud cover, -99 (no match)

Aqua Low Cloud Altitude

Kilometers or -99

Cloud top height (km) for clouds with tops between 0-2km, -99 (no match)

Aqua Low Cloud Opt

number or -99

Optical depth for cloud top heights between 0-2km, -99 (no match)

Aqua Low Cloud Cover

percent % or -99

Total cloud cover of low clouds (0-2km), -99 (no match)

Aqua Low Cloud Phase

integer or -99

Mean cloud particle phase (liquid, mix, ice) for cloud top heights between 0-2km. A particle phase of 1.0 means the entire cloud is water. A particle phase of 2.0 means the entire cloud is ice, -99 (no match)

Aqua Low Cloud Kel

Kelvin or -99

Effective temperature (K) for clouds with tops between 0-2km, -99 (no match)

Aqua Mid Cloud Altitude

Kilometers -99

Cloud top height (km) for clouds with tops between 2-6km, -99 (no match)

Aqua Mid Cloud Opt

number or -99

Optical depth for cloud top heights between 2-6km, -99 (no match)

Aqua Mid Cloud Cover

percent % or -99

Total cloud cover of mid level clouds (2-6km), -99 (no match)

Aqua Mid Cloud Phase

integer or -99

Mean cloud particle phase (liquid, mix, ice) for cloud top heights between 2-6km. A particle phase of 1.0 means the entire cloud is water. A particle phase of 2.0 means the entire cloud is ice, -99 (no match)

Aqua Mid Cloud Kel

Kelvin or -99

Effective temperature (K) for clouds with tops between 2-6km, -99 (no match)

Aqua High Cloud Altitude

Kilometers or -99

Cloud top height (km) for clouds with tops above 6km, -99 (no match)

Aqua High Cloud Opt

number or -99

Optical depth for cloud top heights above 6km, -99 (no match)

Aqua High Cloud Cover

percent % or -99

Total cloud cover of high clouds (> 6km), -99 (no match)

Aqua High Cloud Phase

integer or -99

Mean cloud particle phase (liquid, mix, ice) for cloud top heights above 6km. A particle phase of 1.0 means the entire cloud is water. A particle phase of 2.0 means the entire cloud is ice, -99 (no match)

Aqua High Cloud Kel

Kelvin or -99

Effective temperature (K) for clouds with tops above 6km, -99 (no match)

Aqua Sat Vzen

degrees  or -99

Satellite solar view zenith angle, -99 (no match)

Aqua Sat Szen

degrees or -99

Satellite solar zenith angle, -99 (no match)

Aqua Wind

Meters per seconds (m/s) or -99

Surface wind speed (at 10 m altitude) calculated using u and v vectors based on modeled data (see SSF-57 and SSF-58 - https://ceres.larc.nasa.gov/documents/collect_guide/pdf/SSF_CG_R2V1.pdf), -99 (no match)

Aqua Snow

Percent (%) or -99

Percent snow and ice cover, -99 (no match)

Aqua Ocean

Percent (%) or -99

Percent surface water, -99 (no match)