Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Estimating regional ground-level PM2.5 directly from satellite
  top-of-atmosphere reflectance using deep learning   Almost all remote sensing atmospheric PM2.5 estimation methods need satellite
aerosol optical depth (AOD) products, which are often retrieved from
top-of-atmosphere (TOA) reflectance via an atmospheric radiative transfer
model. Then, is it possible to estimate ground-level PM2.5 directly from
satellite TOA reflectance without a physical model? In this study, this
challenging work are achieved based on a machine learning model. Specifically,
we establish the relationship between PM2.5, satellite TOA reflectance,
observation angles, and meteorological factors in a deep learning architecture
(denoted as Ref-PM modeling). Taking the Wuhan Urban Agglomeration (WUA) as a
case study, the results demonstrate that compared with the AOD-PM modeling, the
Ref-PM modeling obtains a competitive performance, with out-of-sample
cross-validated R2 and RMSE values of 0.87 and 9.89 ug/m3 respectively. Also,
the TOA-reflectance-derived PM2.5 have a finer resolution and larger spatial
coverage than the AOD-derived PM2.5. This work updates the traditional
cognition of remote sensing PM2.5 estimation and has the potential to promote
the application in atmospheric environmental monitoring.

33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph