Laser pulse bidirectional reflectance from CALIPSO mission

Lu, Xiaomei; Hu, Yongxiang; Yang, Yuekui; Vaughan, Mark; Liu, Zhaoyan; Rodier, Sharon; Hunt, William H.; Powell, Kathleen A.; Lucker, Patricia L.; Trepte, Charles R.

doi:10.5194/amt-11-3281-2018

Cited by 14 publications

(10 citation statements)

References 29 publications

(32 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The strong backscatter signal from the ice/snow surface target often saturates the lidar receiver under clear sky (Hu et al, 2007;Lu et al, 2018). For optically thin clouds with cloud optical depth less than 3, we calculate the clear-sky lidar attenuated backscatter by assuming that the ice and snow surface are a perfect Lambertian reflector, which enables us to estimate the optical depth for the column.…”

Section: Appendix A: Methodology For Cloud Microphysicsmentioning

confidence: 99%

Wintertime Cooling of the Arctic TOA by Low‐Level Clouds

Li,

Mace,

Strong

et al. 2023

Geophysical Research Letters

View full text Add to dashboard Cite

Globally, clouds are known to warm the climate system in the thermal infrared because they typically emit thermal radiation to space at effective temperatures lower than the combined cloud‐free atmosphere and surface. However, here we show that ∼40% of low‐level clouds over sea ice tend to cool the Arctic system at TOA and contribute to a radiative cooling of the Arctic winter climate by −2.3 Wm−2, or a ∼16% reduction over the infrared warming effect of all clouds during winter. Based on satellite observations, low‐level clouds residing in surface‐based temperature inversions emit more longwave radiation to space than would occur in cloudless skies. While these clouds are known to significantly warm the surface, they cool the Arctic climate system overall. Our results imply that accurately representing the cloud radiative effects unique to the Arctic could help to constrain the regional energy budget.

show abstract

Section: Appendix A: Methodology For Cloud Microphysicsmentioning

confidence: 99%

Wintertime Cooling of the Arctic TOA by Low‐Level Clouds

Li,

Mace,

Strong

et al. 2023

Geophysical Research Letters

View full text Add to dashboard Cite

show abstract

“…1) Removal of signal that is, flagged as saturated in the data product. Lu et al (2018) implemented a signal saturation flag to the CALIPSO data product. Here, we only consider data that is, not saturated in any way, and ignore data that is, flagged as possibly saturated or certainly saturated as this signal would not yield reliable results.…”

Section: Calispo B Bpmentioning

confidence: 99%

Assessment of using spaceborne LiDAR to monitor the particulate backscatter coefficient on large, freshwater lakes: A test using CALIPSO on Lake Michigan

Watkins

Sayers²,

Shuchman³

et al. 2023

Front. Remote Sens.

View full text Add to dashboard Cite

The Cloud-Aerosol LiDAR and Infrared Pathfinder Satellite Observation (CALIPSO) satellite was launched in 2006 with the primary goal of measuring the properties of clouds and aerosols in Earth’s atmosphere using LiDAR. Since then, numerous studies have shown the viability of using CALIPSO to observe day/night differences in subsurface optical properties of oceans and large seas from space. To date no studies have been done on using CALIPSO to monitor the subsurface optical properties of large, freshwater-lakes. This is likely due to the limited spatial resolution of CALIPSO, which makes the mapping of subsurface properties of regions smaller than large seas impractical. Still, CALIPSO does pass over some of the world’s largest, freshwater-lakes, yielding important information about the water. Here we use the entire CALIPSO data record (approximately 15 years) to measure the particulate backscatter coefficient (bbp, m−1) across Lake Michigan. We then compare the LiDAR derived values of bbp to optical imagery values obtained from MODIS and to in situ measurements. Critically, we find that the LiDAR derived bbp aligns better in non-summer months with in situ values when compared to the optically imagery. However, due to both high cloud coverage and high wind speeds on Lake Michigan, this comes with the caveat that the CALIPSO product is limited in its usability. We close by speculating on the roll that spaceborne LiDAR, including CALIPSO and other satitlites, have on the future of monitoring the Great Lakes and other large bodies of fresh water.

show abstract

“…In particular, a new algorithm that estimates the likelihood of the saturation of the signal returning from the planetary surface was included in the analysis. This information, crucial for the retrieval of ocean product is reported as a flag value assuming the integer values of 0, 1 or 2 for a not saturated, possibly saturated or certainly saturated detection channel, respectively [4]. More information about the data products can be found at the Atmospheric Science Data Center (ASDC) web site (https: //eosweb.larc.nasa.gov/project/calipso/calipso_tab le, last access: 29 march 2019).…”

Section: Caliop Datasetmentioning

confidence: 99%

Particulate Optical Properties in the Mediterranean and Black Seas Through Calipso Spaceborne Lidar Measurements

et al. 2020

View full text Add to dashboard Cite

New applications on global-scale plankton retrievals using the CALIOP (Cloud-Aerosol Lidar with orthogonal Polarization) lidar measurements on the CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) satellite recently suggested that space-based lidars could provide information about the depth distribution of optical scattering. Assessing the oceanic surface layer’s optical properties through CALIOP is one of the reasons of the extension of the CALIOP mission for another 3 years (2018-2020). The objective of this work is the evaluation of the potential CALIOP ocean products in the Mediterranean and Black seas using the ocean color products provided by the Copernicus Marine Environment Monitoring Systems (CMEMS).

show abstract

Laser pulse bidirectional reflectance from CALIPSO mission

Cited by 14 publications

References 29 publications

Wintertime Cooling of the Arctic TOA by Low‐Level Clouds

Wintertime Cooling of the Arctic TOA by Low‐Level Clouds

Assessment of using spaceborne LiDAR to monitor the particulate backscatter coefficient on large, freshwater lakes: A test using CALIPSO on Lake Michigan

Particulate Optical Properties in the Mediterranean and Black Seas Through Calipso Spaceborne Lidar Measurements

Contact Info

Product

Resources

About