ASDC | DISCOVERAQ_California_Ground_CARB_Data

DISCOVER-AQ Level 2

Entry Title: DISCOVER-AQ California Deployment California Air Resources Board (CARB) Data

Entry ID: DISCOVERAQ_California_Ground_CARB_Data_1

Aerosols

Description

DISCOVERAQ_California_Ground_CARB_Data contains data collected by the California Air Resources Board (CARB) at various ground sites throughout the study area, including Fresno, Oildale, and Shafter as part of the California (San Joaquin Valley) deployment of NASA's DISCOVER-AQ field study. This data product contains data for only the California deployment and data collection is complete.

Understanding the factors that contribute to near surface pollution is difficult using only satellite-based observations. The incorporation of surface-level measurements from aircraft and ground-based platforms provides the crucial information necessary to validate and expand upon the use of satellites in understanding near surface pollution. Deriving Information on Surface conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) was a four-year campaign conducted in collaboration between NASA Langley Research Center, NASA Goddard Space Flight Center, NASA Ames Research Center, and multiple universities to improve the use of satellites to monitor air quality for public health and environmental benefit. Through targeted airborne and ground-based observations, DISCOVER-AQ enabled more effective use of current and future satellites to diagnose ground level conditions influencing air quality.

DISCOVER-AQ employed two NASA aircraft, the P-3B and King Air, with the P-3B completing in-situ spiral profiling of the atmosphere (aerosol properties, meteorological variables, and trace gas species). The King Air conducted both passive and active remote sensing of the atmospheric column extending below the aircraft to the surface. Data from an existing network of surface air quality monitors, AERONET sun photometers, Pandora UV/vis spectrometers and model simulations were also collected. Further, DISCOVER-AQ employed many surface monitoring sites, with measurements being made on the ground, in conjunction with the aircraft. The B200 and P-3B conducted flights in Baltimore-Washington, D.C. in 2011, Houston, TX in 2013, San Joaquin Valley, CA in 2013, and Denver, CO in 2014. These regions were targeted due to being in violation of the National Ambient Air Quality Standards (NAAQS).

The first objective of DISCOVER-AQ was to determine and investigate correlations between surface measurements and satellite column observations for the trace gases ozone (O3), nitrogen dioxide (NO2), and formaldehyde (CH2O) to understand how satellite column observations can diagnose surface conditions. DISCOVER-AQ also had the objective of using surface-level measurements to understand how satellites measure diurnal variability and to understand what factors control diurnal variability. Lastly, DISCOVER-AQ aimed to explore horizontal scales of variability, such as regions with steep gradients and urban plumes.

DOI

10.5067/ASDC/SUBORBITAL/DISCOVERAQ_California_Ground_CARB_Data_1

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From GCMD Science Keywords:

PARTICULATE MATTER
NITRIC OXIDE > NITROGEN COMPOUNDS
ATMOSPHERIC CARBON MONOXIDE > CARBON AND HYDROCARBON COMPOUNDS
NON-METHANE HYDROCARBONS/VOLATILE ORGANIC COMPOUNDS > CARBON AND HYDROCARBON COMPOUNDS
NITROGEN DIOXIDE > NITROGEN COMPOUNDS
NITROGEN OXIDES > NITROGEN COMPOUNDS

Data Distribution

File Format(s):

ICARTT

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Spatial Information

Spatial Coverage: (S: 25, N: 45), (W: -130, E: -70)
Spatial Coverage Type: Horizontal Vertical
Coordinate System: Cartesian
Granule Spatial Representation: Cartesian

Locations

NORTH AMERICA UNITED STATES OF AMERICA CALIFORNIA NORTHERN HEMISPHERE WESTERN HEMISPHERE TROPOSPHERE STRATOSPHERE

Temporal Information

Temporal Coverage: 2013-01-12 - 2013-02-14

Platforms

Permanent Land Sites

GROUND STATIONS

GAS SENSORS

TEMPERATURE SENSORS

PRESSURE SENSORS

Metadata Dates

Created on 2021-08-30

Last updated on 2024-04-26

DISCOVER-AQ Level 2

Entry Title: DISCOVER-AQ California Deployment California Air Resources Board (CARB) Data

Entry ID: DISCOVERAQ_California_Ground_CARB_Data_1

Aerosols

DOI

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Data Distribution

File Format(s):

Spatial Information

Locations

Temporal Information

Platforms

Permanent Land Sites

GROUND STATIONS

GAS SENSORS

GAS SENSORS

TEMPERATURE SENSORS

TEMPERATURE SENSORS

PRESSURE SENSORS

PRESSURE SENSORS

Metadata Dates