Nagoya University · 환경과학
우루무츠노가이 교수의 연구실은 대기, 지하수, 강 및 호수 등 다양한 수문환경에서의 안정동위원소 비율(특히 산소-17 이상성 및 질소 동위원소)을 이용해 자연환경의 기후 변화와 오염 여부를 추적하는 데 초점을 맞추고 있습니다. 특히 대기 중 질소산염의 축적과 그 기원을 추적하기 위한 Δ17O 분석 기법을 개발하여, 배경 산림 생태계와 저영양 상태의 호수에서의 질소 순환을 규명하고 있습니다. 또한 지하수의 이온 농도 변화와 기상 변화를 연계해 지진 전구조를 탐지하는 데도 기여하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Chloride (Cl – ) and sulfate (SO 4 2– ) ion concentrations of ground water issuing from two wells located near the epicenter of the Kobe earthquake in Japan fluctuated before the disastrous magnitude 7.2 event on 17 January 1995. The samples measured were pumped ground water packed in bottles and distributed in the domestic market as drinking water from 1993 to April 1995. Analytical results demonstrate that Cl – and SO 4 2– concentrations increased steadily from August 1994 to just before the e
C 2 ‐C 5 non‐methane hydrocarbons (NMHCs) and methyl chloride in the remote maritime atmosphere over the western North Pacific are analyzed in regard to their variation of mixing ratio and 13 C/ 12 C ratio (δ 13 C), together with those in polluted urban (Nagoya and Yokohama) and coastal (Tokyo Bay) atmospheres in Japan. NMHCs show large atmospheric mixing ratio differences between urban (coastal) and maritime atmospheres probably due to emission from urban areas and degradation within the mariti
Abstract. The stable isotopic compositions of nitrate in precipitation (wet deposition) and groundwater (spring, lake, and stream water) were determined for the island of Rishiri, Japan, so as to use the 17O anomalies (Δ17O) to trace the fate of atmospheric nitrate that had deposited onto the island ecosystem, which is a representative background forest ecosystem for eastern Asia. The deposited nitrate had large 17O anomalies with Δ17O values ranging from +20.8‰ to +34.5‰ (n = 32) with +26.2‰ be
Abstract. The stable isotopic compositions of nitrate, including the 17O anomalies (Δ17O), were determined twice in 1 yr (June and August 2007) in the oligotrophic water column of Lake Mashu, Japan. These data were then used to quantify the geochemical dynamics of nitrate in the lake, by using the deposition rate of the atmospheric nitrate onto the entire catchment area of the lake. The total amount of nitrate in the lake water decreased from 4.2 to 2.1 Mmol during the period between the observa
We present a method for high-sensitivity nitrogen isotopic analysis of particulate organic nitrogen (PON) in seawater and freshwater, for the purpose of determining the aquatic nitrogen fixation rate through the 15N2 tracer technique for samples that contain a low abundance of organisms. The method is composed of the traditional oxidation/reduction methods, such as the oxidation of PON to nitrate (NO3*) using persulfate, the reduction of NO3* to nitrite (NO2*) using spongy cadmium, and further r
