Hiroshi Okochi

2019

1 引用 (Scopus)

Characteristics of trace metal concentration and stable isotopic composition of hydrogen and oxygen in “urban-induced heavy rainfall” in downtown Tokyo, Japan; The implication of mineral/dust particles on the formation of summer heavy rainfall

Uchiyama, R., Okochi, H., Ogata, H., Katsumi, N. & Nakano, T., 2019 3 1, ： : Atmospheric Research. 217, p. 73-80 8 p.

研究成果: Article

trace metal

isotopic composition

hydrogen

dust

oxygen

1 引用 (Scopus)

Fungal spore involvement in the resuspension of radiocaesium in summer

Igarashi, Y., Kita, K., Maki, T., Kinase, T., Hayashi, N., Hosaka, K., Adachi, K., Kajino, M., Ishizuka, M., Sekiyama, T. T., Zaizen, Y., Takenaka, C., Ninomiya, K., Okochi, H. & Sorimachi, A., 2019 12 1, ： : Scientific Reports. 9, 1, 1954.

研究成果: Article

公開

Fungal Spores

Air

Nuclear Power Plants

High-Throughput Nucleotide Sequencing

Basidiomycota

Ground-based observation of lightning-induced nitrogen oxides at a mountaintop in free troposphere

Wada, R., Sadanaga, Y., Kato, S., Katsumi, N., Okochi, H., Iwamoto, Y., Miura, K., Kobayashi, H., Kamogawa, M., Matsumoto, J., Yonemura, S., Matsumi, Y., Kajino, M. & Hatakeyama, S., 2019 1 1, ： : Journal of Atmospheric Chemistry.

研究成果: Article

Nitrogen Oxides

Troposphere

Lightning

nitric oxide

nitrogen oxides

2018

1 引用 (Scopus)

Chemical structural features of Humic-like Substances (HULIS) in urban atmospheric aerosols collected from Central Tokyo with special reference to nuclear magnetic resonance spectra

Katsumi, N., Miyake, S. & Okochi, H., 2018 6 1, ： : Asian Journal of Atmospheric Environment. 12, 2, p. 153-164 12 p.

研究成果: Article

nuclear magnetic resonance

resin

aerosol

summer

nitrogen dioxide

2 引用 (Scopus)

Development of an analytical method for the detection of NO_z and its application to the atmospheric analysis at a mountain site

Wada, R., Sadanaga, Y., Kato, S., Katsumi, N., Okochi, H., Iwamoto, Y., Miura, K., Kobayashi, H., Kamogawa, M., Matsumoto, J., Yonemura, S., Matsumi, Y., Kajino, M. & Hatakeyama, S., 2018 1 1, ： : Bunseki Kagaku. 67, 6, p. 333-340 8 p.

研究成果: Article

Chemiluminescence

Fluorescence spectroscopy

Air

Lasers

Ozone

1 引用 (Scopus)

Diurnal Variations in Partitioning of Atmospheric Glyoxal and Methylglyoxal between Gas and Particles at the Ground Level and in the Free Troposphere

Mitsuishi, K., Iwasaki, M., Takeuchi, M., Okochi, H., Kato, S., Ohira, S. I. & Toda, K., 2018 9 20, ： : ACS Earth and Space Chemistry. 2, 9, p. 915-924 10 p.

研究成果: Article

Glyoxal

Pyruvaldehyde

Troposphere

diurnal variations

troposphere

Humic-like substances global levels and extraction methods in aerosols

Katsumi, N., Miyake, S., Okochi, H., Minami, Y., Kobayashi, H., Kato, S., Wada, R., Takeuchi, M., Toda, K. & Miura, K., 2018 1 1, (Accepted/In press) ： : Environmental Chemistry Letters.

研究成果: Article

extraction method

Aerosols

resin

Resins

aerosol

The impacts of “urban-induced heavy rains” on the distribution of deposition fluxes of inorganic acidic substances in the Tokyo metropolitan area in summer

Uchiyama, R., Okochi, H., Kamiya, J., Asai, D., Kaneko, C., Ogata, H. & Katsumi, N., 2018 2 1, ： : Atmospheric Research. 200, p. 109-116 8 p.

研究成果: Article

metropolitan area

summer

rainfall

distribution

rain

3 引用 (Scopus)

The seasonal variations of atmospheric ^134,137Cs activity and possible host particles for their resuspension in the contaminated areas of Tsushima and Yamakiya, Fukushima, Japan

Kinase, T., Kita, K., Igarashi, Y., Adachi, K., Ninomiya, K., Shinohara, A., Okochi, H., Ogata, H., Ishizuka, M., Toyoda, S., Yamada, K., Yoshida, N., Zaizen, Y., Mikami, M., Demizu, H. & Onda, Y., 2018 12 1, ： : Progress in Earth and Planetary Science. 5, 1, 12.

研究成果: Article

resuspension

seasonal variation

autumn

biomass burning

winter

2017

7 引用 (Scopus)

First demonstration of aerial gamma-ray imaging using drone for prompt radiation survey in Fukushima

Mochizuki, S., Kataoka, J., Tagawa, L., Iwamoto, Y., Okochi, H., Katsumi, N., Kinno, S., Arimoto, M., Maruhashi, T., Fujieda, K., Kurihara, T. & Ohsuka, S., 2017 11 17, ： : Journal of Instrumentation. 12, 11, P11014.

研究成果: Article

Gamma Rays

Gamma rays

decontamination

Demonstrations

Decontamination

6 引用 (Scopus)

Geochemical and stable isotope characteristics of urban heavy rain in the downtown of Tokyo, Japan

Uchiyama, R., Okochi, H., Ogata, H., Katsumi, N., Asai, D. & Nakano, T., 2017 9 15, ： : Atmospheric Research. 194, p. 109-118 10 p.

研究成果: Article

stable isotope

rainwater

typhoon

wet deposition

rain

2 引用 (Scopus)

H and O isotopic differences in typhon and urban-induced heavy rain in Tokyo

Uchiyama, R., Okochi, H., Ogata, H., Katsumi, N., Asai, D. & Nakano, T., 2017 7 3, (Accepted/In press) ： : Environmental Chemistry Letters. p. 1-7 7 p.

研究成果: Article

Isotopes

Rain

stable isotope

rainwater

typhoon

High Time-Resolution Monitoring of Free-Tropospheric Sulfur Dioxide and Nitric Acid at the Summit of Mt. Fuji, Japan

Takeuchi, M., Miyazaki, Y., Tanaka, H., Isobe, T., Okochi, H. & Ogata, H., 2017, ： : Water, Air, and Soil Pollution. 228, 9

研究成果: Article

Nitric Acid

Sulfur Dioxide

Sulfur dioxide

Nitric acid

nitric acid

Long-term variations in the distribution of radioactive Cs in plant, soil, stream bottom sand in a small forest in Fukushima prefecture

Kinno, S., Okochi, H., Katsumi, N., Ogata, H., Kataoka, J., Kishimoto, A., Iwamoto, Y., Sorimachi, A. & Tokonami, S., 2017, ： : Bunseki Kagaku. 66, 3, p. 163-174 12 p.

研究成果: Article

Sand

Soils

Needles

Buffers

Decontamination

4 引用 (Scopus)

The impact of air pollutants on rainwater chemistry during “urban-induced heavy rainfall” in downtown Tokyo, Japan

Uchiyama, R., Okochi, H., Katsumi, N. & Ogata, H., 2017 6 27, ： : Journal of Geophysical Research: Atmospheres. 122, 12, p. 6502-6519 18 p.

研究成果: Article

Air Pollutants

rainwater

contaminants

Rain

Japan

2 引用 (Scopus)

Ultracompact Compton camera for innovative gamma-ray imaging

Kataoka, J., Kishimoto, A., Taya, T., Mochizuki, S., Tagawa, L., Koide, A., Sueoka, K., Morita, H., Maruhashi, T., Fujieda, K., Kurihara, T., Arimoto, M., Okochi, H., Katsumi, N., Kinno, S., Matsunaga, K., Ikeda, H., Shimosegawa, E., Hatazawa, J., Ohsuka, S. および6人, Toshito, T., Kimura, M., Nagao, Y., Yamaguchi, M., Kurita, K. & Kawachi, N., 2017 1 1, (Accepted/In press) ： : Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.

研究成果: Article

Gamma rays

Cameras

cameras

gamma rays

Imaging techniques

2016

11 引用 (Scopus)

Atmospheric CO, O₃, and SO₂ measurements at the summit of Mt. Fuji during the summer of 2013

Kato, S., Shiobara, Y., Uchiyama, K., Miura, K., Okochi, H., Kobayashi, H. & Hatakeyama, S., 2016 10 1, ： : Aerosol and Air Quality Research. 16, 10, p. 2368-2377 10 p.

研究成果: Article

Carbon Monoxide

trajectory

atmospheric gas

air

summer

2015

3 引用 (Scopus)

Diurnal variation of atmospheric electric field at the summit of Mount Fuji, Japan, distinctly different from the Carnegie curve in the summertime

Kamogawa, M., Suzuki, Y., Sakai, R., Fujiwara, H., Torii, T., Kakinami, Y., Watanabe, Y., Sato, R., Hashimoto, S., Okochi, H., Miura, K., Yasuda, H., Orihara, Y. & Suzuki, T., 2015 4 28, ： : Geophysical Research Letters. 42, 8, p. 3019-3023 5 p.

研究成果: Article

diurnal variations

diurnal variation

electric field

Japan

electric fields

5 引用 (Scopus)

Novel methods for estimating 3D distributions of radioactive isotopes in materials

Iwamoto, Y., Kataoka, J., Kishimoto, A., Nishiyama, T., Taya, T., Okochi, H., Ogata, H. & Yamamoto, S., 2015 11 5, (Accepted/In press) ： : Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.

研究成果: Article

Radioisotopes

Gamma rays

radioactive isotopes

estimating

gamma rays

26 引用 (Scopus)

Recent progress of MPPC-based scintillation detectors in high precision X-ray and gamma-ray imaging

Kataoka, J., Kishimoto, A., Fujita, T., Nishiyama, T., Kurei, Y., Tsujikawa, T., Oshima, T., Taya, T., Iwamoto, Y., Ogata, H., Okochi, H., Ohsuka, S., Ikeda, H. & Yamamoto, S., 2015 6 1, ： : Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 784, p. 248-254 7 p.

研究成果: Article

Scintillation counters

Radiation counters

Gamma rays

scintillation

counters

2014

5 引用 (Scopus)

Foliar rinse study of atmospheric black carbon deposition to leaves of konara oak (Quercus serrata) stands

Hara, H., Kashiwakura, T., Kitayama, K., Bellingrath-Kimura, S. D., Yoshida, T., Takayanagi, M., Yamagata, S., Murao, N., Okochi, H. & Ogata, H., 2014 4 1, ： : Atmospheric Environment. 97, p. 511-518 8 p.

研究成果: Article

black carbon

forest floor

oak

plateau

defoliation

13 引用 (Scopus)

Individual aerosol particles in and below clouds along a Mt. Fuji slope: Modification of sea-salt-containing particles by in-cloud processing

Ueda, S., Hirose, Y., Miura, K. & Okochi, H., 2014 2, ： : Atmospheric Research. 137, p. 216-227 12 p.

研究成果: Article

sea salt

aerosol

particle

sulfuric acid

sulfate

18 引用 (Scopus)

Performance and field tests of a handheld Compton camera using 3-D position-sensitive scintillators coupled to multi-pixel photon counter arrays

Kishimoto, A., Kataoka, J., Nishiyama, T., Fujita, T., Takeuchi, K., Okochi, H., Ogata, H., Kuroshima, H., Ohsuka, S., Nakamura, S., Hirayanagi, M., Adachi, S., Uchiyama, T. & Suzuki, H., 2014 11 1, ： : Journal of Instrumentation. 9, 11, P11025.

研究成果: Article

Scintillator

performance tests

field tests

Phosphors

scintillation counters

2013

Determination of polycyclic aromatic hydrocarbons in atmospheric water using stir bar sorptive extraction and HPLC with fluorescence detection

Fujita, M., Okochi, H., Ogata, H., Nagoya, T. & Minami, Y., 2013, ： : Bunseki Kagaku. 62, 12, p. 1111-1116 6 p.

研究成果: Article

Polycyclic Aromatic Hydrocarbons

Fluorescence

Water

Liquid chromatography

Rain

1 引用 (Scopus)

Development of rapid preparation method for simultaneous analysis of gas-phase polycyclic aromatic hydrocarbons and oxygenated polycyclic aromatic hydrocarbons using accelerated solvent extractor

Kobayashi, Y., Okochi, H., Ogata, H. & Nagoya, T., 2013, ： : Bunseki Kagaku. 62, 10, p. 879-889 11 p.

研究成果: Article

Polycyclic Aromatic Hydrocarbons

Gases

Recovery

Rapid determination of anionic surfactants in atmospheric aerosol in an urban area using an improved methylene blue method

Soda, M., Okochi, H., Ogata, H. & Okawa, H., 2013, ： : Bunseki Kagaku. 62, 7, p. 589-594 6 p.

研究成果: Article

Atmospheric aerosols

Quartz

Anionic surfactants

Methylene Blue

Fibers

2010

10 引用 (Scopus)

Changes in concentration levels of polycyclic aromatic compounds associated with airborne particulate matter in downtown tokyo after introducing government diesel vehicle controls

Kojima, Y., Inazu, K., Hisamatsu, Y., Okochi, H., Baba, T. & Nagoya, T., 2010 6, ： : Asian Journal of Atmospheric Environment. 4, 1, p. 1-8 8 p.

研究成果: Article

diesel

particulate matter

PAH

aromatic compound

vehicle

11 引用 (Scopus)

Comparison of PAHs, Nitro-PAHs and Oxy-PAHs associated with airborne particulate matter at roadside and urban background sites in downtown Tokyo, Japan

Kojima, Y., Inazu, K., Hisamatsu, Y., Okochi, H., Baba, T. & Nagoya, T., 2010 10, ： : Polycyclic Aromatic Compounds. 30, 5, p. 321-333 13 p.

研究成果: Article

Roadsides

Particulate Matter

Polycyclic Aromatic Hydrocarbons

Polycyclic aromatic hydrocarbons

1-nitropyrene

2 引用 (Scopus)

Determination of volatile organic compounds in rainwater and dew water by head space solid-phase microextraction and gas chromatography/mass spectrometry

Sato, E., Okochi, H. & Igawa, M., 2010, ： : Bunseki Kagaku. 59, 7, p. 551-557 7 p.

研究成果: Article

Volatile Organic Compounds

Volatile organic compounds

Gas chromatography

Mass spectrometry

Water

2 引用 (Scopus)

Development of low volume air sampling and rapid sample preparation for the determination of atmospheric gas-phase polycyclic aromatic hydrocarbons using styrene-divinylbenzene copolymer resin adsorbent

Kobayashi, A., Kojima, Y., Okochi, H. & Nagoya, T., 2010, ： : Bunseki Kagaku. 59, 8, p. 645-652 8 p.

研究成果: Article

divinyl benzene

Styrene

Polycyclic Aromatic Hydrocarbons

Adsorbents

Copolymers

38 引用 (Scopus)

Influence of secondary formation on atmospheric occurrences of oxygenated polycyclic aromatic hydrocarbons in airborne particles

Kojima, Y., Inazu, K., Hisamatsu, Y., Okochi, H., Baba, T. & Nagoya, T., 2010 8, ： : Atmospheric Environment. 44, 24, p. 2873-2880 8 p.

研究成果: Article

PAH

particulate matter

particle

diurnal variation

temporal variation

Long-term performance of a solar-powered small automatic rainwater collector and its application to acid deposition monitoring in the southeast mountainside of Mt. Fuji

Maruyama, S., Okochi, H., Takemura, N. & Minami, Y., 2010, ： : Bunseki Kagaku. 59, 5, p. 357-362 6 p.

研究成果: Article

Acids

Monitoring

Rain gages

Rain

Fluxes

2008

3 引用 (Scopus)

Atmospheric occurrence of 2-nitrobenzanthrone associated with airborne particles in central Tokyo

Inazu, K., Nam, V. D., Asato, T., Okochi, H., Hisamatsu, Y., Kobayashi, T. & Baba, T., 2008 8, ： : Polycyclic Aromatic Compounds. 28, 4-5, p. 562-577 16 p.

研究成果: Article

Aromatic compounds

1-nitropyrene

Nitrates

Hydrocarbons

Cyclic Hydrocarbons

8 引用 (Scopus)

Effect of atmospheric humic-like substances on the enhanced dissolution of volatile organic compounds into dew water

Okochi, H., Sato, E., Matsubayashi, Y. & Igawa, M., 2008 3, ： : Atmospheric Research. 87, 3-4, p. 213-223 11 p.

研究成果: Article

dew

volatile organic compound

dissolution

fulvic acid

water

2007

32 引用 (Scopus)

Adsorption of air pollutants on the grain surface of Japanese cedar pollen

Okuyama, Y., Matsumoto, K., Okochi, H. & Igawa, M., 2007 1, ： : Atmospheric Environment. 41, 2, p. 253-260 8 p.

研究成果: Article

pollen

adsorption

Adsorption

Nitric acid

Air

4 引用 (Scopus)

Development of solar-powered rainwater collector and observation of wet deposition fluxes on the mountainside of Mt. Fuji

Funakura, T., Okochi, H., Nagoya, T., Inazu, K., Minami, Y. & Igarashi, Y., 2007, ： : Bunseki Kagaku. 56, 9, p. 805-811 7 p.

研究成果: Article

Fluxes

Rain

polycarbonate

Bottles

Rain gages

1 引用 (Scopus)

Erratum to "Adsorption of air pollutants on the grain surface of Japanese cedar pollen". [Atmospheric Environment 41 (2007) 253-260] (DOI: 10.1016/j.atmosenv.2006.08.009)

Okuyama, Y., Matsumoto, K., Okochi, H. & Igawa, M., 2007 6, ： : Atmospheric Environment. 41, 18, p. 3939-3940 2 p.

研究成果: Article

Adsorption

Air

1 引用 (Scopus)

Preliminary study on evaluation of effects of acid deposition on forested ecosystem in East Tanzawa Mountains estimated from chemical characteristics of stream waters

Honda, T., Okochi, H., Inadzu, K. & Igawa, M., 2007, ： : Bunseki Kagaku. 56, 9, p. 791-798 8 p.

研究成果: Article

Ecosystems

Acids

Water

Nitrates

Nitrogen

2006

10 引用 (Scopus)

Scavenging effect of precipitation on volatile organic compounds in ambient atmosphere

Sato, E., Matsumoto, K., Okochi, H. & Igawa, M., 2006, ： : Bulletin of the Chemical Society of Japan. 79, 8, p. 1231-1233 3 p.

研究成果: Article

Volatile Organic Compounds

Scavenging

Humic Substances

Organic compounds

Rain

2005

17 引用 (Scopus)

Enhanced dissolution of volatile organic compounds into urban dew water collected in Yokohama, Japan

Okochi, H., Kataniwa, M., Sugimoto, D. & Igawa, M., 2005 10, ： : Atmospheric Environment. 39, 33, p. 6027-6036 10 p.

研究成果: Article

dew

Volatile organic compounds

volatile organic compound

Dissolution

dissolution

2004

28 引用 (Scopus)

Characteristics of water-soluble components of atmospheric aerosols in Yokohama and Mt. Oyama, Japan from 1990 to 2001

Takeuchi, M., Okochi, H. & Igawa, M., 2004 9, ： : Atmospheric Environment. 38, 28, p. 4701-4708 8 p.

研究成果: Article

Atmospheric aerosols

Aerosols

aerosol

Organic carbon

urban site

16 引用 (Scopus)

The enhanced dissolution of some chlorinated hydrocarbons and monocyclic aromatic hydrocarbons in rainwater collected in Yokohama, Japan

Okochi, H., Sugimoto, D. & Igawa, M., 2004 8, ： : Atmospheric Environment. 38, 26, p. 4403-4414 12 p.

研究成果: Article

chlorinated hydrocarbon

Aromatic hydrocarbons

aromatic hydrocarbon

rainwater

Rain

2003

10 引用 (Scopus)

Deposition of coarse soil particles and ambient gaseous components dominating dew water chemistry

Takeuchi, M., Okochi, H. & Igawa, M., 2003 5 27, ： : Journal of Geophysical Research D: Atmospheres. 108, 10

研究成果: Article

dew

water chemistry

soils

chemistry

Soils

2 引用 (Scopus)

Transport characteristics of neutralization dialysis and desalination of tap water

Igawa, M., Mikami, K. & Okochi, H., 2003, ： : Bulletin of the Chemical Society of Japan. 76, 2, p. 437-441 5 p.

研究成果: Article

Dialysis

Desalination

Membranes

Water

Ion exchange

2002

8 引用 (Scopus)

Acid fog removes calcium and boron from fir tree: One of the possible causes of forest decline

Igawa, M., Okumura, K., Okochi, H. & Sakurai, N., 2002 11 16, ： : Journal of Forest Research. 7, 4, p. 213-215 3 p.

研究成果: Article

Abies

forest decline

Boron

acid deposition

Weather

16 引用 (Scopus)

Controlling factors of weak acid and base concentrations in urban dewwater - Comparison of dew chemistry with rain and fog chemistry

Takeuchi, M., Okochi, H. & Igawa, M., 2002, ： : Bulletin of the Chemical Society of Japan. 75, 4, p. 757-764 8 p.

研究成果: Article

Fog

formic acid

Rain

Ions

Acids

38 引用 (Scopus)

High frequency and large deposition of acid fog on high elevation forest

Igawa, M., Matsumura, K. & Okochi, H., 2002 1 1, ： : Environmental Science and Technology. 36, 1, p. 1-6 6 p.

研究成果: Article

Fog

fog

Nitric Acid

nitric acid

Nitric acid

40 引用 (Scopus)

Potential trace metal-organic complexation in the atmosphere.

Okochi, H. & Brimblecombe, P., 2002 3 21, ： : The Scientific World Journal. 2, p. 767-786 20 p.

研究成果: Article

Complexation

Atmosphere

complexation

trace metal

Metals

2 引用 (Scopus)

Selective transport of heavy metal ions across a cation-exchange membrane with a chelating agent in the receiving phase

Igawa, M., Narita, Y. & Okochi, H., 2002 10, ： : Bulletin of the Chemical Society of Japan. 75, 10, p. 2269-2273 5 p.

研究成果: Article

Chelating Agents

Heavy Metals

Heavy ions

Metal ions

Cations

19 引用 (Scopus)

Severe leaching of calcium ions from fir needles caused by acid fog

Igawa, M., Kase, T., Satake, K. & Okochi, H., 2002, ： : Environmental Pollution. 119, 3, p. 375-382 8 p.

研究成果: Article

Weather

Fog

fog

Needles

Leaching

大河内 博

大河内博