Note on the Areal Variation of Deuterium/Hydrogen Ratios in Rainfall for a Single Storm Event

Gambell, Arlo W.; Friedman, Irving

doi:10.1175/1520-0450(1965)004<0533:notavo>2.0.co;2

Cited by 8 publications

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“…Similar phenomena have been observed by several studies for LPS (temperate cyclones in USA; Crawford et al, ; Gambell & Friedman, ; Gedzelman & Lawrence, ; Lawrence et al, ). These studies observed the lower isotopic composition of precipitation in a cold sector of a cyclone and near the low‐pressure center.…”

Section: Discussionsupporting

confidence: 87%

“…When an LPS passes north of Hokkaido (LPS‐NW), the Japan Sea side receives precipitation from both the warm and cold sectors of the LPS near the center, whereas the Pacific Ocean side receives precipitation mainly from the warm sector. The δ 18 O values of precipitation formed near the low‐pressure center in both the cold and warm sectors are expected to be low, due to the well‐developed cloud system by the center (Gambell & Friedman, ; Gedzelman & Lawrence, ). This may cause the spatial variation in δ 18 O between the Japan Sea side (lower) and the Pacific Ocean side (higher).…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have proposed that atmospheric circulation influences the isotopic composition of precipitation (Aggarwal, Frohlich, Kulkarni, & Gourcy, ; Araguas‐Araguas, Froehlich, & Rozanski, ; Friedman, Harris, Smith, & Johnson, ; Lawrence et al, ; Liu, Bowen, & Welker, ; Theakstone, ), and some reported that changes in evaporation condition and subsequent prior rainout history affect variations in the isotopic composition of the moisture source (Crawford, Hollins, Meredith, & Hughes, ; Crawford, Hughes, & Parkes, ; Dansgaard, ; Samuels‐Crow et al, ; Tang et al, ). Effects of the route (storm track) and structure of low‐pressure systems (LPSs) on the isotopic composition of precipitation and atmospheric water vapor have also been investigated in middle latitude (Gambell & Friedman, ; Gedzelman & Lawrence, ; Lawrence, Gedzelman, White, Smiley, & Lazov, ) and tropical regions (Fudeyasu et al, ; Lawrence et al, ). In addition, relationships between the isotopic composition and various atmospheric circulation patterns, such as the Arctic and North Atlantic Oscillations (Welker, Rayback, & Henry, ), Pacific–North American index (Birks & Edwards, ), and the East Asian monsoon (Kurita et al, ), have been suggested.…”

Section: Introductionmentioning

confidence: 99%

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Spatial and temporal variations of stable isotopes in precipitation in midlatitude coastal regions

Sugimoto

Ueta

2017

Hydrological Processes

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Spatial and temporal variations of the isotopic composition of precipitation were investigated to better understand their controlling factors. Precipitation was collected from six locations in Hokkaido, Japan, and event-based analyses were conducted for a period from March 2010 to February 2013. Relatively low δ values and a high d-excess for annual averages were observed at three sites located along the Japan Sea compared to the three sites at Pacific Ocean side.Lower δ values in spring and fall and higher d-excess in winter were observed for the region along the Japan Sea. In total, 264 precipitation events were identified. Precipitation originated predominantly from low-pressure system (LPS) events, which were classified as northwest (LPS-NW) and southeast (LPS-SE) events according to the routes of the low-pressure center, that passed northwest and southeast of Hokkaido, respectively. LPS-SE events showed lower δ 18 O than LPS-NW events, which is attributable to the lower δ 18 O of water vapor resulting from heavy rainfalls in the upstream region of the LPS air mass trajectories over the Pacific Ocean. This phenomenon observed in Hokkaido can be found in other midlatitude coastal regions and applied for hydrological, atmospheric, and paleoclimate studies. A characteristic spatial pattern was found in LPS-NW events, in which lower δ 18 O was observed on the Japan Sea side than on the Pacific Ocean side in each season. This is likely due to the location of the sampling sites and their distance from the LPS: Precipitation with lower δ 18 O in the region along the Japan Sea occurs in a well-developed cloud system near the low-pressure center in cold and warm sectors of LPS, whereas precipitation with higher δ 18 O on the Pacific side mainly occurs in a warm sector away from the low-pressure center. Air mass from the north does not always cause low δ in precipitation, and the precipitation process in the upstream region is another important factor controlling the isotopic composition of precipitation, other than the local temperature and precipitation amount. KEYWORDS air mass trajectory, atmospheric water vapor, Hokkaido, precipitation event, route of low-pressure system, stable isotopes of water

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%