Taku Umezawa

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Speaker, Author, Co-Author

Sun. May 29, 2022 11:00 AM - 1:00 PM Online Poster Zoom Room (8) (Ch.08)

[J] Poster
| A (Atmospheric and Hydrospheric Sciences )
| A-AS Atmospheric Sciences, Meteorology & Atmospheric Environment

[A-AS11] Atmospheric Chemistry

11:00 AM - 1:00 PM

[AAS11-P01] Vertical profiles of halocarbons in the stratosphere over Japan in 2020 and implications for the “mean age” of the stratospheric air

*Shoko Hikichi¹, Shinji Morimoto¹, Taku Umezawa², Takuya Saito², Sakae Toyoda³, Satoshi Sugawara⁴, Shigeyuki Ishidoya⁵, Hideyuki Honda¹, Shuji Aoki¹ (1.Graduate School of Science, Tohoku University, 2.National Institute for Environmental Studies, 3.Tokyo Institute of Technology, 4.Miyagi University of Education, 5.National Institute of Advanced Industrial Science and Technology)

11:00 AM - 1:00 PM

[AAS11-P07] Development of a high-accuracy dynamic dilution system for generating ambient level carbonyl sulfide standard gas

*Hideki Nara¹, Takuya Saito¹, Taku Umezawa¹, Yasunori Tohjima¹ (1.National Institute for Environmental Studies)

Thu. May 26, 2022 10:45 AM - 12:15 PM 301B (International Conference Hall, Makuhari Messe)

[J] Oral
| A (Atmospheric and Hydrospheric Sciences )
| A-CC Cryospheric Sciences & Cold District Environment

[A-CC29] Ice cores and paleoenvironmental modeling

11:45 AM - 12:00 PM

[ACC29-11] Towards reconstructing the Arctic atmospheric methane history over the 20th century: measurement and modeling results for the NGRIP firn

*Taku Umezawa¹, Satoshi Sugawara², Kenji Kawamura^3,4,5, Ikumi Oyabu³, Stephen Andrews^1,6, Takuya Saito¹, Shuji Aoki⁷, Takakiyo Nakazawa⁷ (1.National Institute for Environmental Studies, 2.Miyagi University of Education, 3.National Institute of Polar Research, 4.The Graduate University of Advanced Studies (SOKENDAI), 5.Japan Agency for Marine Science and Technology, 6.University of York, 7.Tohoku University)