DAAC Home > Resources > News

News

ACT-America

ACT-America: L2 Weighting Functions for Airborne Lidar CO2

Submitted by ORNL DAAC Staff on 2022-06-27
Image Media
Image Media
Caption

Locations of ACT-America flights collecting MFLL carbon dioxide (CO2) measurements over eastern and central U.S. in 2016-2018.

Body
Vertical weighting function coefficients of the L2 remotely sensed column-average CO2 concentrations during Summer 2016, Winter 2017, Fall 2017, and Spring 2018.

CPL-derived Atmospheric Boundary Layer Top Height

Submitted by ORNL DAAC Staff on 2022-01-09
Image Media
Image Media
Caption

Top: Annotated time-height cross-section of aerosol backscatter profiles measured using CPL onboard C-130 aircraft on 2016-07-26. Wavelet-derived ABL top (black solid-circles) height overlaid. Middle: Secondary aerosol layers overlaid on the top panel. Bottom: Final attributed ABL top heights. 

Body
ABL top heights and the altitudes of the two additional aerosol layers derived from CPL measurements using the Haar wavelet transform method.

Greenhouse Gases Measured from Instrumented Communication Towers

Submitted by ORNL DAAC Staff on 2020-10-05
Image Media
Image Media
Caption

The communication tower at the Wessington, South Dakota site. This site was instrumented from January of 2017 to September of 2019.

Body

Level 1 atmospheric greenhouse gas concentrations are available for towers across the central and eastern USA.

ACT-America: L3 Integrated Measurements and 2019 Data

Submitted by ORNL DAAC Staff on 2020-07-15
Image Media
Image Media
Caption

ACT-America 2019 summer airborne campaign showing the flight paths for the two aircrafts and location of ground towers. Flights were concentrated on three study domains: northeast, south-central, and midwest regions of the United States.

Body

A new version of merged in situ atmospheric trace gases and flask data from the Atmospheric Carbon and Transport-America project is now available.

THREDDS NetCDF Subsetting Service Bug Fixed

Submitted by ORNL DAAC Staff on 2020-06-24
Image Media
Image Media
Caption

Unidata's THREDDS Data Server (TDS) is a web server that provides metadata and data access for scientific datasets, using a variety of remote data access protocols.

Body

A bug has been fixed in the THREDDS Data Server (TDS) NetCDF Subsetting Service (NCSS) that may, in rare cases, have returned incorrect results.