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准教授

カトリ プラデイープ

KHATRI PRADEEP

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理工学部 共生創造理工学科
理工学研究科 環境共生工学専攻
専門分野

大気科学、大気リモートセンシング
研究テーマ
  1. リモートセンシングデータを用いたエアロゾルと雲の動態および気候への影響の解明
  2. エアロゾルと雲に対する地上リモートセンシング手法の開発とその応用解析
  3. 衛星観測に基づくエアロゾルと雲プロダクトの精度評価及び高度化
研究内容 エアロゾルは大気中に浮遊する人為的または自然的起源の微粒子であり、直接的な効果として太陽放射を散乱・吸収して放射場に影響を与える一方、間接的な効果として雲粒子の数や反射率、降水量を変化させることで気候に影響を与えます。しかし、地理的・空間的な変動が激しく、寿命が短いエアロゾルの気候影響に関する科学的な理解は、二酸化炭素などの温室効果ガスと比較して限られています。このような課題の解明に向けて、リモートセンシング手法を用いたエアロゾルと雲の気候影響の解明に取り組んでいます。その一環として、地上によるエアロゾル・雲の観測や新規なリモートセンシング手法の開発、地上および衛星リモートセンシングデータの解析、地上観測データを用いた衛星観測プロダクトの精度評価・向上などの研究を行っています。また、大気と深く関連する再生可能エネルギー、健康被害、大気浄化、持続可能な農業などの他分野との融合研究にも取り組んでいます。
担当科目

地球化学、環境科学、地球科学概論、先端理工学トピックス、ケーススタディII：理工、地球科学実験、環境分析化学実験、環境共生工学特別演習I-IV、環境共生工学特別研究I-IV
主な経歴・職歴・学歴

2001年7月　中国  浙江大学環境工学部  卒業

2003年9月　名古屋大学大学院環境学研究科　　博士課程前期課程　　修了

2007年3月　名古屋大学大学院環境学研究科　　博士課程後期課程　　修了

2007年3月〜2007年９月　愛知学院大学教養部　非常勤務講師  

2007年10月〜2009年９月 千葉大学環境リモートセンシング研究センター  外国特別研究員

2009年10月〜2010年3月 千葉大学環境リモートセンシング研究センター  補佐員　

2010年4月〜2011年3月 千葉大学環境リモートセンシング研究センター  特任助教

2011年4月〜2011年9月 千葉大学環境リモートセンシング研究センター  大学機関研究員

2011年10月〜2016年3月 千葉大学環境リモートセンシング研究センター  特任助教

2016年4月〜2017年1月 千葉大学環境リモートセンシング研究センター  教育研究支援者

2017年2月〜2019年12月 東北大学大学院理学研究科大気海洋変動観測研究センター  助教

2020年1月〜2024年3月 東北大学大学院理学研究科大気海洋変動観測研究センター  講師

2024年4月〜 創価大学理工学部共生創造理工学科　准教授
所属学会・団体
  • アメリカ地球物理学連合（AGU）
  • 日本地球惑星科学連合（JpGU）
  • 日本気象学会（MSJ）
主な論文･著書
  1. Ningombam, S. S., Larson, E. J. L., Indira, G., Madhavan, B. L., and Khatri, P.: Aerosol classification by application of machine learning spectral clustering algorithm, Atmospheric Pollution Research, 15, 10.1016/j.apr.2023.102026, 2024.
  2. Khatri, P., Yoshida, K., and Hayasaka, T.: Aerosol Effects on Water Cloud Properties in Different Atmospheric Regimes, Journal of Geophysical Research: Atmospheres, 128, 10.1029/2023jd039729, 2023.
  3. Letu, H., Ma, R., Nakajima, T. Y., Shi, C., Hashimoto, M., Nagao, T. M., Baran, A. J., Nakajima, T., Xu, J., Wang, T., Tana, G., Bilige, S., Shang, H., Chen, L., Ji, D., Lei, Y., Wei, L., Zhang, P., Li, J., Li, L., Zheng, Y., Khatri, P., and Shi, J.: Surface Solar Radiation Compositions Observed from Himawari-8/9 and Fengyun-4 Series, Bulletin of the American Meteorological Society, 104, E1772-E1789, 10.1175/bams-d-22-0154.1, 2023.
  4. Singh, T., Y. Matsumi, T. Nakayama, S. Hayashida, P. K. Patra, N. Yasutomi, M. Kajino, K. Yamaji, P. Khatri, M. Takigawa, H. Araki, Y. Kurogi, K. Kuji, K. Muramatsu, R. Imasu, A. Ananda, A. A. Arbain, R. Khaiwal, S. Bhardwaj, S. Kumar, S. Mor, S. K. Dhaka, A. P. Dimri, A. Sharma, N. Singh, M. S. Bhatti, R. Yadav, K. Vatta, and S. Mor, Very high particulate pollution over northwest India captured by a high-density in situ sensor network, Sci Rep,doi: 10.1038/s41598-023-39471-1, 2023.
  5. Kobayashi, H., H. Irie, M. Momoi, T. Ohno, H. Yamamoto, P. Khatri, I. Sano, H. Okumura, H. Kobayashi, Development and classification of Japanese-region-specific aerosol modes based on 10-year sky radiometer observations, Sola, doi:10.2151/sola.2023-027,2023.
  6. Khatri, P., and T. Hayasaka, Comparison of Cloud Properties between SGLI Aboard GCOM-C Satellite and MODIS Aboard Terra Satellite, Remote Sensing, 15(4), doi:10.3390/rs15041075,2023.
  7. Ningombam, S. S., P. Khatri, E. J. L. Larson, U. C. Dumka, C. Sarangi, and R. Vineeth, Classification of MODIS fire emission data based on aerosol absorption Angstrom exponent retrieved from AERONET data, Sci Total Environ, 858(Pt 2), 159898, doi:10.1016/j.scitotenv.2022.159898,2023.
  8. Patra, P. K., and P. Khatri, Atmospheric Mixing Ratio of Greenhouse Gases and Radiative Forcing. In: Handbook of Air Quality and Climate Change, Akimoto, H., and H. Tanimoto (eds), Springer, Singapore. doi: 10.1007/978-981-15-2527-8_29-1,2022.
  9. Dumka, U. C., D. G. Kaskaoutis, P. Khatri, S. S. Ningombam, R. Sheoran, S. Jade, T. S. Shrungeshwara, and M. Rupakheti, Water vapour characteristics and radiative effects at high-altitude Himalayan sites, Atmospheric Pollution Research, 13(2), doi:10.1016/j.apr.2021.101303,2022.
  10. Khatri, P., T. Hayasaka, H. Irie, H. Letu, T. Y. Nakajima, H. Ishimoto, and T. Takamura, Quality assessment of Second-generation Global Imager (SGLI)-observed cloud properties using SKYNET surface observation data, Atmospheric Measurement Techniques, 15(6), 1967-1982, doi:10.5194/amt-15-1967-2022,2022a.
  11. Khatri, P., T. Hayasaka, B. N. Holben, R. P. Singh, H. Letu, and S. N. Tripathi, Increased aerosols can reverse Twomey effect in water clouds through radiative pathway, Sci Rep, 12(1), 20666, doi:10.1038/s41598-022-25241-y,2022b.
  12. Kajino, M., M. Deushi, T. T. Sekiyama, N. Oshima, K. Yumimoto, T. Y. Tanaka, J. Ching, A. Hashimoto, T. Yamamoto, M. Ikegami,A. Kamada, M. Miyashita, Y. Inomata, S. Shima, P. Khatri, A. Shimizu,H. Irie, K. Adachi, Y. Zaizen, Y. Igarashi, H. Ueda, T. Maki, and M. Mikami, Comparison of three aerosol representations of NHM-Chem (v1.0) for the simulations of air quality and climate-relevant variables, Geoscientific Model Development, 14(4), 2235-2264, doi:10.5194/gmd-14-2235-2021,2021.
  13. Khatri, P., and T. Hayasaka, Impacts of COVID-19 on Air Quality over China: Links with Meteorological Factors and Energy Consumption, Aerosol and Air Quality Research, 21(10), doi:10.4209/aaqr.200668,2021.
  14. Khatri, P., T. Hayasaka, B. Holben, S. N. Tripathi, P. Misra, P. K. Patra, S. Hayashida, and U. C. Dumka, Aerosol Loading and Radiation Budget Perturbations in Densely Populated and Highly Polluted Indo‐Gangetic Plain by COVID‐19: Influences on Cloud Properties and Air Temperature, Geophysical Research Letters, 48(20), doi:10.1029/2021gl093796,2021.
  15. Letu, H., T. Y. Nakajima, T. Wang, H. Shang, R. Ma, K. Yang, A. J. Baran, J. Riedi, H. Ishimoto, M. Yoshida, C. Shi, P. Khatri, Y. Du, L. Chen, and J. Shi, A new benchmark for surface radiation products over the East Asia-Pacific region retrieved from the Himawari-8/AHI next-generation geostationary satellite, Bulletin of the American Meteorological Society, 1-40, doi:10.1175/bams-d-20-0148.1,2021.
  16. Misra, P., M. Takigawa, P. Khatri, S. K. Dhaka, A. P. Dimri, K. Yamaji, M. Kajino, W. Takeuchi, R. Imasu, K. Nitta, P. K. Patra, and S. Hayashida, Nitrogen oxides concentration and emission change detection during COVID-19 restrictions in North India, Sci Rep, 11(1), 9800, doi:10.1038/s41598-021-87673-2,2021.
  17. Takamura, T., and P. Khatri, Uncertainties in Radiation Measurement Using a Rotating Shadow-Band Spectroradiometer, Journal of the Meteorological Society of Japan. Ser. II, 99(6), 1547-1561, doi:10.2151/jmsj.2021-075,2021.
  18. Wetchayont, P., T. Hayasaka, and P. Khatri, Air Quality Improvement during COVID-19 Lockdown in Bangkok Metropolitan, Thailand: Effect of the Long-range Transport of Air Pollutants, Aerosol and Air Quality Research, 21(7), doi:10.4209/aaqr.200662,2021.
  19. Letu, H., K. Yang, T. Y. Nakajima, H. Ishimoto, T. M. Nagao, J. Riedi, A. J. Baran, R. Ma, T. Wang, H. Shang, P. Khatri, L. Chen, C. Shi, and J. Shi, High-resolution retrieval of cloud microphysical properties and surface solar radiation using Himawari-8/AHI next-generation geostationary satellite, Remote Sensing of Environment, 239, doi:10.1016/j.rse.2019.111583,2020.
  20. Khatri, P., H. Ooashi, and H. Iwabuchi, Investigating Aerosol Effects on Maritime Deep Convective Clouds Using Satellite and Reanalysis Data, Sola, 16(0), 228-232, doi:10.2151/sola.2020-038,2020.
  21. Nakajima, T., M. Campanelli, H. Che, V. Estellés, H. Irie, S.-W. Kim, J. Kim, D. Liu, T. Nishizawa, G., V.  K. Soni, B. Thana, N.-U. Tugjsurn, K. Aoki, S. Go, M. Hashimoto, A. Higurashi, S. Kazadzis, P. Khatri, N. Kouremeti, R. Kudo, F. Marenco, M. Momoi, S. S. Ningombam, C. L. Ryder, A. Uchiyama, and A. Yamazaki, An overview of and issues with sky radiometer technology and SKYNET, Atmospheric Measurement Techniques, 13(8), 4195-4218, doi:10.5194/amt-13-4195-2020,2020.
  22. Damiani, A., H. Irie, T. Takamura, R. Kudo, P. Khatri, H. Iwabuchi, R. Masuda, and T. Nagao, An Intensive Campaign-Based Intercomparison of Cloud Optical Depth from Ground and Satellite Instruments under Overcast Conditions, Sola, 15(0), 198-204, doi:10.2151/sola.2019-036,2019.
  23. Irie, H., H. M. S. Hoque, A. Damiani, H. Okamoto, A. M. Fatmi, P. Khatri, T. Takamura, and T. Jarupongsakul, Simultaneous observations by sky radiometer and MAX-DOAS for characterization of biomass burning plumes in central Thailand in January–April 2016, Atmospheric Measurement Techniques, 12(1), 599-606, doi:10.5194/amt-12-599-2019,2019.
  24. Khatri, P., H. Iwabuchi, T. Hayasaka, H. Irie, T. Takamura, A. Yamazaki, A. Damiani, H. Letu, and Q. Kai, Retrieval of cloud properties from spectral zenith radiances observed by sky radiometers, Atmospheric Measurement Techniques, 12(11), 6037-6047, doi:10.5194/amt-12-6037-2019,2019.
  25. Damiani, A., H. Irie, T. Horio, T. Takamura, P. Khatri, H. Takenaka, T. Nagao, T. Y. Nakajima, and R. R. Cordero, Evaluation of Himawari-8 surface downwelling solar radiation by ground-based measurements, Atmospheric Measurement Techniques, 11(4), 2501-2521, doi:10.5194/amt-11-2501-2018,2018.
  26. Mok, J., N. A. Krotkov, O. Torres, H. Jethva, Z. Li, J. Kim, J.-H. Koo, S. Go, H. Irie, G. Labow, T. F. Eck, B. N. Holben, J. Herman, R. P. Loughman, E. Spinei, S. Soo Lee, P. Khatri, and M. Campanelli, Comparisons of spectral aerosol single scattering albedo in Seoul, South Korea, Atmospheric Measurement Techniques, 11(4), 2295-2311, doi:10.5194/amt-11-2295-2018,2018.
  27. Khatri, P., T. Hayasaka, H. Iwabuchi, T. Takamura, H. Irie, and T. Y. Nakajima, Validation of MODIS and AHI Observed Water Cloud Properties Using Surface Radiation Data, Journal of the Meteorological Society of Japan. Ser. II, 96B(0), 151-172, doi:10.2151/jmsj.2018-036,2018a.
  28. Khatri, P., H. Iwabuchi, and M. Saito, Vertical Profiles of Ice Cloud Microphysical Properties and Their Impacts on Cloud Retrieval Using Thermal Infrared Measurements, Journal of Geophysical Research: Atmospheres, 123(10), 5301-5319, doi:10.1029/2017jd028165,2018b.
  29. Irie, H., T. Horio, A. Damiani, Y. T. Nakajima, H. Takenaka, M. Kikuchi, P. Khatri, and K. Yumimoto, Importance of Himawari-8 Aerosol Products for Energy Management System, Earozoru Kenkyu, 32, 95-100, doi:10.11203/jar.32.95,2017.
  30. Khatri, P., T. Takamura, T. Nakajima, V. Estellés, H. Irie, H. Kuze, M. Campanelli, A. Sinyuk, S. -M. Lee, B. J. Sohn, G. Padhithurai, S. -W.Kim, S. C. Yoon, J. A. M. Lozano, M. Hashimoto, P. C. S. Devara , and N. Manago, Factors for inconsistent aerosol single scattering albedo between SKYNET and AERONET, Journal of Geophysical Research: Atmospheres, 121(4), 1859-1877, doi:10.1002/2015jd023976,2016a.
  31. Khatri, P., H. Irie, T. Takamura, and H. Letu, Optical characteristics of aerosols and clouds studied by using ground-based SKYNET and satellite remote sensing data, IEEE International Geoscience and Remote Sensing, 377-380, doi:10.1109/IGARSS.2016.7729092,2016b.
  32. Yumimoto, K., T. M. Nagao, M. Kikuchi, T. T. Sekiyama, H. Murakami, T. Y. Tanaka, A. Ogi, H. Irie, P. Khatri, H. Okamura, K. Arai, I. Morino, O. Uchino, and T. Maki, Aerosol data assimilation using data from Himawari‐8, a next‐generation geostationary meteorological satellite, Geophysical Research Letters, 43(11), 5886-5894, doi:10.1002/2016gl069298,2016.
  33. Nakajima, T. Y., T. Nakajima, H. Irie, Y. Shimoda, Y. Iwafune, K. Hidaka, Y. Yamamoto, H. Takenaka, T. Watanabe, P. Khatri, J. Uchida, T. Inoue, A. Higurashi, S. Nishikori, M. Tsujimoto, and K. Aramaki, Earth science and demand science for the energy management system, Journal of the society of instruments and control engineers, 55, 585-591, doi:10.11499/sicejl.55.585,2016.
  34. Ningombam, S. S., S. P. Bagare, P. Khatri, B. J. Sohn, and H. J. Song, Estimation of aerosol radiative forcing over an aged-background aerosol feature during advection and non-advection events using a ground-based data obtained from a Prede Skyradiometer observation, Atmospheric Research, 164-165, 76-83, doi:10.1016/j.atmosres.2015.05.001,2015.
  35. Sugimoto, N., A. Shimizu, T. Nishizawa, I. Matsui, Y. Jin, P. Khatri, H. Irie, T. Takamura, K. Aoki, and B. Thana, Aerosol characteristics in Phimai, Thailand determined by continuous observation with a polarization sensitive Mie–Raman lidar and a sky radiometer, Environmental Research Letters, 10(6), doi:10.1088/1748-9326/10/6/065003,2015.
  36. Bi, J., J. Shi, Y. Xie, Y. Liu, T. Takamura, and P. Khatri, Dust Aerosol Characteristics and Shortwave Radiative Impact at a Gobi Desert of Northwest China during the Spring of 2012, Journal of the Meteorological Society of Japan. Ser. II, 92A(0), 33-56, doi:10.2151/jmsj.2014-A03,2014.
  37. Campanelli, M., T. Nakajima, P. Khatri, T. Takamura, A. Uchiyama, V. Estelles, G. L. Liberti, and V. Malvestuto, Retrieval of characteristic parameters for water vapour transmittance in the development of ground-based sun–sky radiometric measurements of columnar water vapour, Atmospheric Measurement Techniques, 7(4), 1075-1087, doi:10.5194/amt-7-1075-2014,2014.
  38. Che, H., G. Shi, H. Zhao, T. Nakajima, P. Khatri, T. Takamura, H. Wang, Y. Wang, J. Sun, and X. Zhang, Aerosol Optical Properties Retrieved from a Prede Sky Radiometer over an Urban Site of Beijing, China, Journal of the Meteorological Society of Japan. Ser. II, 92A(0), 17-31, doi:10.2151/jmsj.2014-A02,2014.
  39. Koike, M., N. Moteki, P. Khatri, T. Takamura, N. Takegawa, Y. Kondo, H. Hashioka, H. Matsui, A. Shimizu, and N. Sugimoto, Case study of absorption aerosol optical depth closure of black carbon over the East China Sea, Journal of Geophysical Research: Atmospheres, 119(1), 122-136, doi:10.1002/2013jd020163,2014.
  40. Khatri, P., T. Takamura, A. Shimizu, and N. Sugimoto, Observation of low single scattering albedo of aerosols in the downwind of the East Asian desert and urban areas during the inflow of dust aerosols, Journal of Geophysical Research: Atmospheres, 119(2), 787-802, doi:10.1002/2013jd019961,2014a.
  41. Khatri, P., T. Takamura, A. Yamazaki, and A. Uchiyama, Use of 315 nm Channel Data of the Sky Radiometer to Estimate the Columnar Ozone Concentration: A Preliminary Study, Journal of the Meteorological Society of Japan. Ser. II, 92A(0), 185-194, doi:10.2151/jmsj.2014-A12,2014b.
  42. Ningombam, S. S., S. P. Bagare, R. B. Singh, M. Campanelli, P. Khatri, and N. Dorjey, Calibration of a Sky radiometer (Prede) using observations obtained from Hanle and Merak high-altitude stations in Ladakh, Atmospheric Research, 143, 118-128, doi:10.1016/j.atmosres.2014.02.009,2014.
  43. Wang, Z., D. Liu, Z. Wang, Y. Wang, P. Khatri, J. Zhou, T. Takamura, and G. Shi, Seasonal characteristics of aerosol optical properties at the SKYNET Hefei site (31.90°N, 117.17°E) from 2007 to 2013, Journal of Geophysical Research: Atmospheres, 119(10), 6128-6139, doi:10.1002/2014jd021500,2014.
  44. Dim, J. R., T. Takamura, A. Higurashi, P. Khatri, N. Kikuchi, and T. Y. Nakajima, Validation of Two MODIS Aerosols Algorithms with SKYNET and Prospects for Future Climate Satellites Such as the GCOM-C/SGLI, Advances in Meteorology, 2013, 1-16, doi:10.1155/2013/508064,2013.
  45. Hashimoto, M., T. Nakajima, O. Dubovik, M. Campanelli, H. Che, P. Khatri, T. Takamura, and G. Pandithurai, Development of a new data-processing method for SKYNET sky radiometer observations, Atmospheric Measurement Techniques, 5(11), 2723-2737, doi:10.5194/amt-5-2723-2012,2012.
  46. Khatri, P., T. Takamura, A. Yamazaki, and Y. Kondo, Retrieval of Key Aerosol Optical Parameters from Spectral Direct and Diffuse Irradiances Observed by a Radiometer with Nonideal Cosine Response Characteristic, Journal of Atmospheric and Oceanic Technology, 29(5), 683-696, doi:10.1175/jtech-d-11-00111.1,2012.
  47. Liu, Y., J. Huang, G. Shi, T. Takamura, P. Khatri, J. Bi, J. Shi, T. Wang, X. Wang, and B. Zhang, Aerosol optical properties and radiative effect determined from sky-radiometer over Loess Plateau of Northwest China, Atmospheric Chemistry and Physics, 11(22), 11455-11463, doi:10.5194/acp-11-11455-2011,2011.
  48. Khatri, P., T. Takamura, A. Shimizu, and N. Sugimoto, Spectral Dependency of Aerosol Light-Absorption over the East China Sea Region, Sola, 6, 1-4, doi:10.2151/sola.2010-001,2010.
  49. Khatri, P., and T. Takamura, An Algorithm to Screen Cloud-Affected Data for Sky Radiometer Data Analysis, Journal of the Meteorological Society of Japan, 87(1), 189-204, doi:10.2151/jmsj.87.189,2009.
  50. Khatri, P., Y. Ishizaka, and T. Takamura, A Study on Aerosol Optical Properties in an Urban Atmosphere of Nagoya, Japan, Journal of the Meteorological Society of Japan, 87(1), 19-38, doi:10.2151/jmsj.87.19,2009.
  51. Khatri, P., and Y. Ishizaka, Effects of Continentally Polluted Airmass on Aerosol Optical Properties over the East China Sea, Journal of the Meteorological Society of Japan, 85, 47-68, doi:https://doi.org/10.2151/jmsj.85.47,2007.
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