Cha ac e izing Ea h-like
Exoplane s: Insigh s om
Ea hshine Obse a ions
G I U L I A R O C C E T T I - E S O & L M U
w i h
MI C H AE L S T ER ZI K ( ESO )
CL AU DI A E MDE ( LM U )
MI H AI L MA N EV ( LM U )
JU L IA S E I DEL (E SO )
ST EF A NO BA GN U LO
( ARM AG H)
E A R T H S H I N E O B S E R V A T I O N S
•Sunligh sca e ed by Ea h’s
a mosphe e and e lec ed om he
luna su ace
•The Moon ac s as a di use mi o
•Resemble e lec ed ligh obse a ions
o exoplane s
H O W TO S T U D Y T H E E A R T H AS AN E X O P L A N E T
S A T E L L I T E
O B S E R V A T I O N S
E X O P L A N E T S
O B S E R V A T I O N S
•high spa ial esolu ion
•local p ope ies
•low spec al esolu ion
•spa ially un esol ed
•disk-in eg a ed p ope ies
•high spec al esolu ion
E A R T H S H I N E IN P O L A R I S A T I O N
•Pola isa ion : no need o co ec o
he ansmission h ough Ea h’s
a mosphe e
•Enhance he con as be ween he
plane and he s a
•Mo e in o ma ion on he p ope ies o
he plane
SURFACE REFLECTION
OCEAN GLINTCLOUD DROPLETS
W H A T C A U S E S P O L A R I S A T I O N ?
SINGLE SCATTERING
MOLECULES
DEPOLARISATION CLOUDS AND AEROSOLS
Ocean
C A T A L O G U E OF T H E O B S E R V A T I O N S
Ocean Ocean
Ocean OceanRocky Rocky
Rocky
Rocce i+ 2025c (in p ep.)
M O D E L L I N G E A R T H S H I N E
MYSTIC – Mon e Ca lo code o phYsically
co ec T acing o pho ons in Cloudy
a mosphe es
•Realis ic 3D a mosphe es
•Inhomogeneous clouds and su aces
Maye &Kylling 2005
Emde+ 2016
M O D E L L I N G E A R T H S H I N E
•Emde+ 2017 showed he impo ance
o he ocean glin ea u e
•Simula ions could no i he
obse a ions in pola isa ion
•Simplis ic assump ions on clouds
and plane a y su aces
Emde+ 2017
P L A N E T A R Y S U R F A C E
Hype spec al Albedo
Maps da ase wi h high
Spa ial and TEmpo al
Resolu ion (HAMSTER)
•PCA eg ession
algo i hm
•In e pola e MODIS
albedo p oduc
among i s 7 bands in
he VIS/NIR
Hype spec al na u e o
su ace e lec i i y is key
Rocce i+ 2024
S U R F A C E V A R I A B I L I T Y : O C E A N VS. L A N D
Rocce i+ 2025c (in p ep.)
T A K E H O M E M E S S A G E S
•Ea hshine allows o cha ac e ise Ea h as a
spa ially un esol ed exoplane a di e en
phase angles
•Re lec ed ligh simula ions a e e y sensi i e o
clouds and plane a y su aces
•Pola isa ion can dis inguish ocean s. land
su aces
•VRE is o e es ima ed i no conside ing linea
combina ion o di e en su ace ypes
Giulia Rocce i -
giulia. occe [email protected] g
