ESA-JAXA Pre-Launch EarthCARE
Science and Validation Workshop

13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

Aerosol optical properties and validation
plan by using sky radiometer
Kazuma Aoki: University of Toyama, Japan
JAXA AOID 8: Interaction of cloud, water vapor and aerosol optical properties by using sky radiometer
Kazuma Aoki (Univ. Toyama), Kazuaoki Kawamoto (Nagasaki Univ.), Tomohito Yamada (Hokkaido Univ.), Masahiro Hori (Univ. Toyama)

JAXA AOID 8: Interaction of cloud, water vapor and aerosol optical properties by using sky radiometer
Kazuma Aoki (Univ. Toyama), Kazuaoki Kawamoto (Nagasaki Univ.), Tomohito Yamada (Hokkaido Univ.), Masahiro Hori (Univ. Toyama)

Introduction

Our Objectives:
We investigated the long-term monitoring of aerosol and cloudoptical properties at ground-based and maritime measurements
since 1990's by using the Sky radiometer (PREDE., Co. Ltd., Tokyo,Japan), based on JAXA RA (ex. GCOM-C/SGLI, EarthCARE).
One of the objectives was to understand the effect on earth
climate change, and the other was to validate satellite andnumerical models. In this presentation, we show the observation
plan of solar aureole measurements that record of aerosol opticalproperties with temporal and spatial variability, as well as the newinterpretation of “Aerosol” to snow, water vapor and cloud
observations, after launch for EarthCARE.
ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

JAXA AOID 8: Interaction of cloud, water vapor and aerosol optical properties by using sky radiometer
Kazuma Aoki (Univ. Toyama), Kazuaoki Kawamoto (Nagasaki Univ.), Tomohito Yamada (Hokkaido Univ.), Masahiro Hori (Univ. Toyama)

What is the Sky radiometer

S KYRADio- n e t we b s it e :h t t p :/ / s kyr a d . s ci. u - t oya ma . a c. j p•

We ob s e r ve d on ly in d a yt ime u n d e r c le a r s kie s a t e a c h s it e .

•Eve r y 1 0 min / on c e ( a u r e ole )•Eve r y 1 min / on c e ( d ir e c t )•P OM- 0 1 : 0 . 3 1 5 , 0 . 4 , 0 . 5 , 0 . 6 7 5 , 0 . 8 7 , 0 . 9 4 , 1 . 0 2 µm•

P OM- 0 2 : 0 . 3 1 5 , 0 . 3 4 , 0 . 3 8 , 0 . 4 , 0 . 5 , 0 . 6 7 5 , 0 . 8 7 , 0 . 9 4 , 1 . 0 2 , 1 . 6 2 7 , 2 . 2 µm•

AOD ( 0 . 3 5 5 µm) c a lc u la t e d f r om Alp h a a s va lid a t ion d a t a f or Ea r t h CARE.

•

Da t a h a ve b e e n a n a lyze d b y a n in ve r s ion s of t wa r e c a lle d S KYRAD. p a c k( Na ka j ima e t a l. 1 9 9 6 ) . Ava ila b le ve r . a r e S KYRAD. p a c k 4 . 2 . L0 , L1 A & L2 A.

•

Un d e r d e ve lop me n t u s in g t h e GRAS P a lg or it h m. ( Momoi e t a l. ( P os t e r No. 6 ) ) .

•Re f . e x. Aoki. , 2 0 1 3 , Nakajima et al, AMT, 2020, Dubovik et al, 2021

Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy• ESA-JAXA.

JAXA AOID 8: Interaction of cloud, water vapor and aerosol optical properties by using sky radiometer
Kazuma Aoki (Univ. Toyama), Kazuaoki Kawamoto (Nagasaki Univ.), Tomohito Yamada (Hokkaido Univ.), Masahiro Hori (Univ. Toyama)

Sky radiometer Observation in main Japanese site
Suzu_SUZ
since 2009

Tomakomai_TMK
since 2015

New site!
Monbetsu_MBE
since 2023

Sapporo_ILTS_SPK
since 1997
Toyama_TOY
since 2002

Kagurazaka_TUS_KGR
Since 1993

SPKTOY

RVM

Tsukuba_JAXA_TKJ
since 2013

Etchujima_ETJ
since 1996

KSG
Uozu_UOZ
since 2020

R/V Mirai_JAMSTEC_RVM
since 1999

Mt.Jodo_Tateyama_JOD
since 2005
Alt. 2839 m

Kasuga_RIAM_KSG
since 2003
ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

Mt.Unzen_Nita_UZN
since 2022
Alt. 1100 m

Nagasaki_NGS
since 1996

JAXA AOID 8: Interaction of cloud, water vapor and aerosol optical properties by using sky radiometer
Kazuma Aoki (Univ. Toyama), Kazuaoki Kawamoto (Nagasaki Univ.), Tomohito Yamada (Hokkaido Univ.), Masahiro Hori (Univ. Toyama)Long-term record of Aerosol optical properties in SPK, TOY & KSG: 2017.12 - now

Sapporo_ILTS_SPK
since 1997

Toyama_TOY
since 2002

Kasuga_RIAM_KSG
since 2003

We show the observation of GCOM-C priopd (Dec 2017 to now)that aerosol optical properties with temporal and spatial
variability. The optical thickness has a clear seasonal cycle atJapan site, with a spring to early summer maximum and an
autumn to winter minimum. Ångström exponent seems large
variability, with a summer maximum and an spring minimum.
ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

JAXA AOID 8: Interaction of cloud, water vapor and aerosol optical properties by using sky radiometer
Kazuma Aoki (Univ. Toyama), Kazuaoki Kawamoto (Nagasaki Univ.), Tomohito Yamada (Hokkaido Univ.), Masahiro Hori (Univ. Toyama)

R/V Mirai (MR17-08 to MR23-05) Aerosol optical propertites over the Ocean

R/V Mirai_JAMSTEC_RVM
since 1999

MR17MR18MR20MR21lowWe show the observation of GCOM-C priopd(2017 to 2023 R/V Mirai Cruise) that aerosol
optical properties over the Ocean. The opticalthickness has a clear, higher the closer to land,
lower the further away. Especially close toland, where seems large variability of both
AOD and Alpha.

MR22ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy

MR23highJAXA AOID 8: Interaction of cloud, water vapor and aerosol optical properties by using sky radiometer
Kazuma Aoki (Univ. Toyama), Kazuaoki Kawamoto (Nagasaki Univ.), Tomohito Yamada (Hokkaido Univ.), Masahiro Hori (Univ. Toyama)

Summary

We will support for EarthCARE validation data with a research focus on aerosol to cloud interaction
from a many kind of locations, from solar radiation observations to land, over the ocean, mountains
and cities and so on. We look forward to the launch next spring.

Thanks.
ESA-JAXA Pre-Launch EarthCARE Science and Validation Workshop | 13 – 17 November 2023 | ESA-ESRIN, Frascati (Rome), Italy