Japanese plan for YOPP-SH

Naohiko Hirasawa

National Institute of Polar Research

YOPP-SH, OSUJune 6, 2016

Introduction

● Contribute to YOPP-SH with our scientific activities.

Long-term field experiment for detection and study of climate change in East Antarctica

Naohiko Hirasawa1 , National Institute of Polar Research

Teruo Aoki2, Masahiko Hayashi3, Koji Fujita4, Yoshinori Iizuka5, Naoyuki Kurita4, Hideaki Motoyama1,

and collaborators1NIPR, 2MRI, 3Fukuoka University, 4Nagoya University, 5Hokkaido University

At Symposium for Polar Science, NIPR, Tokyo, Nov. 16, 2015

(Steig et al., 2009)

Background in climatology – Temperature and accumulation -

Robust warming in WAThe most rapid warming

0.17℃／decade

Suppression of Warming in EA

● The mechanism of the E-W contrast in SAT trends, especially the EA suppression in warming has not been understood yet.

● Accumulation (SMB) in DML starts to increase (?)

Snow stakes monitoringalong the traverse route by JARE (Motoyama et al., 2015, JARE Data Rep.)

2004-2011(Boening et al., 2012)

Syowa

Dome F

1992-2003

IPCC, 2007

(Hirasawa et al., 2000)

Synoptic-scale circulation is important!● Advection of heat and moisture

● On down-steam side of the advection (Under preparation, Hirasawa et al.)

Dec. 2012 - Jan. 2013

SAT

at S

yow

a (℃

)

Ice on the AIS (1200 m).Surface melting by warming. 500hPa Geopotential Height

9 Jan. 2013

SyowaL

Foehn

Design of the field experiment- Data from our activity to YOPP-SH -

● Enhanced AWSs (★funded, ☆planned)

SAT, Pre, WS/WD,Snow depth (by ultra-sound),Radiation (4 comp.),Snow temperature (3m of depth).

● Campaign observation(at the AWS-points for a month in summer andwinter)

Radiosonde,Ceilometer,Snow fall (by disdrometer),Snow grain size, Impurelity,UAV, Tethered balloon, etc.

H128Mizuho

Relay stationDome Fuji

ドームC

Syowa

MD246

Radiosonde

Yearly schedule of radiosonde and AWS network (plan)

“ Under line ”: done/decided or planed to be funded

Pre YOPP-SH2016-Jan. Install AWS at H1282017-Jan. Radiosonde at S17, 2/d, 1 month

Radiosonde on Ship, 2/d, 10 daysYOPP-SH2018-Jan. Install AWS at Dome F

Radiosonde at Dome F, 2/d, 1 monthFeb.-Mar. Radiosonde on Ship, 2/d, 1 monthFeb.

| Enhanced Radiosonde at Syowa, 3-4 times/d| (under negotiation with JMA)

2019-Jan. Install AWS at MizuhoRadiosonde at Mizuho, 2/d, 1 month

Post YOPP-SH2019-Oct. Radiosonde at Mizuho, 2/d, 1 month2020-Jan. Install AWS at Relay station or MD246

Summary

● The Japanese plan is partly still under negotiation, includingthe budget.

● Our contribution to YOPP-SH will be enhanced radiosondeobservation and AWS network.

● Radiosonde observation will be (1) enhanced at Syowa stationand (2) added at several areas on the ice-sheet for about amonth in summers and winters. (3) If we have budget more,operation on ship will be added.

● AWS network on the ice-sheet will contribute to YOPP-SH,too.

● We continue efforts to expand our plan.

Thank you for your attention!