EPIC Spectral Observations of Variability in Earth's Global Reflectance.

Weidong Yang, Alexander Marshak, Tamás Várnai, Yuri Knyazikhin

Abstract read

In one paragraph

Article in Remote sensing, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it

0cells of the map it votes in

0citing papers in PubMed

–field-weighted citation impact

1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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3 · Its place in the literature

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0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

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PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Weidong YangGoddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, MD 21046, USA.

Alexander MarshakNASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.

Tamás VárnaiNASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.

Yuri KnyazikhinDepartment of Earth and Environment, Boston University, Boston, MA 02215, USA.

Funding

Goddard Space Flight Center NASAIntramural NASA N-999999

6 · The paper itself

Abstract

NASA's Earth Polychromatic Imaging Camera (EPIC) onboard NOAA's Deep Space Climate Observatory (DSCOVR) satellite observes the entire sunlit Earth every 65 to 110 min from the Sun-Earth Lagrangian L1 point. This paper presents initial EPIC shortwave spectral observations of the sunlit Earth reflectance and analyses of its diurnal and seasonal variations. The results show that the reflectance depends mostly on (1) the ratio between land and ocean areas exposed to the Sun and (2) cloud spatial and temporal distributions over the sunlit side of Earth. In particular, the paper shows that (a) diurnal variations of the Earth's reflectance are determined mostly by periodic changes in the land-ocean fraction of its the sunlit side; (b) the daily reflectance displays clear seasonal variations that are significant even without including the contributions from snow and ice in the polar regions (which can enhance daily mean reflectances by up to 2 to 6% in winter and up to 1 to 4% in summer); (c) the seasonal variations of the sunlit Earth reflectance are mostly determined by the latitudinal distribution of oceanic clouds.

Indexed as

cloudsland and oceanspectral reflectancesunlit part of the EarthThe Earth Polychromatic Imaging Camera (EPIC)

Identifiers

PMID31632826

DOI10.3390/rs10020254

PMCPMC6800679

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.