「第62回 大気環境学会年会 講演要旨集
令和3年(2021年)9月15日(水)～9月17日(金) オンライン開催(公社)大気環境学会 学術賞(斎藤潔賞)受賞記念講演」

­č ăƧ4>4­ąĈúŁŌAPBRƨ1. #)!
ìô! /ƍ×ĉĿ"ŶûŁŌ# 1970 Êa!ĵĬ^Ğũ¹2ŎŠbƕģż"µśÞĵĬQƁƅL8G@KĈúĥČ"Ì .ŏ!ī§Ľ+vī§ŁŹcƧvīŁƨ!,/vķŶû ƒ±0/*!ý ERB Ŧŋ0 ņ*Õ-0-"ŶûÓ0ERB"Ųl!Ĳ*!ĦŤ!ƍ×ĉĿ!Ɣ/ŁŌ!Ɣ1-2. ìôđr £"ƍ×ĉĿī§Ľ!,/vŶû#v 29 ĝ! ŤůĔ=?DKÓ0 0.5mm eƕĆ" pH p2Űø_ £"ª´QŇ´!Ąƀļ»ķ!f pH p Ƨìôđ"ÂÄƌ2(ƨŬìô"z´Qð´!ůĔ0/2¤'vīŁŶû#ƕĆ2Ʀ64J?"ĐſšŰøƕĆYƜđ¦Þ|ěÍ"Ɣn -z´!ƣěÍ"Ɯđ¦Þ|2(ƕĆ#[!ìôđċÁ £ůĔ00-2Ʀ
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eŢ/ƑÀ#2000 Êa}Ɵ!#Y"ĵĬĖ £!æ/Ɛ"Ɯđ¦łƍ"ĉĿ ůĔ0Ƨ 1ƨƜđ¦łƍ"ĉĿƐ#ƕĆƐƕĆYěÍ x!Uí/z´!¨/ "´ő©2 £y"łƥƍģâ{Ɛ"© ŵî/#ƙSêŀĜĢĠ"FNR<R
ţ -0/ANP#­ąƕVģY"Ɯđ¦łƥ"ěÍĄz´!#ŀĜ!æ/p'Uí'­ąƕVģY"Ɯđ¦ICģěÍ#Ɯđ¦łƥý"z´!ƣª´!f´ő©2Ń -éĚľ"­ąƕVģYÞ|#Y! /ŀĜĢĠ"ÐƝ2Ï/ Ń0
Fig.1 Relationship between precipitation,
0-"Ŝù2éĚľ"ƍ×ĉĿ!»/Ŋ"ĵĬ
concentration and deposition of nss-SO42Ė -"łƥ"ļ»ºW2ć)/)!À¿­µ ĪyƌŁŌ
averaged from 2003 through 2006 in variousAPBRƧĩÙïģżŁŌßƤľTòıƨ! ­ą
regions (Japan: 68 sites by MOE and JELA,North America: 250 sites by NADP, Europe:ƕVģY"Ɯđ¦łƍ"łƥegĄĔ·2¸ë97 sites by EMEP, East Asia: 21 sites byEANET).

3. łƥegĄ!,/ĵĬĖºWŰø
4>4­Ɩ"ƠV"ìôđċÁ!eŢ/ƑÀ! /łƥ"ĉĿƐ¶·egĄ" 28 ÊƓƇşůĔ!,. ĝ! /łƥ"ĉĿ2Ųlłƥ"ĉĿƐ#z´!¬ª´!½ ´ő©2ŃłƥegĄƧd34S  (‰) = ((34S/32S)/(34S/32S)ƪ1)×1000ƨ# 0ƫ14‰"Œ!.z´!ƣª´!
f©2Ń0-"p -đ¦ºW!,/Uí|2ÆÎƜđ¦Þ|!įö/ţ -0/łƥegĄƧd 34Snss (‰) = (d 34S ƪd 34S ×f) / (1-f)Ʃf #đ¦ºWĨd 34S # 20.3‰űŐƨ# 0ƫ6‰"Œ!
£y%Y­Ɩ -ĵĬ/łƥƍģ"egĄ2ãű/)éĚľy"[ ĵĬĖ/Å¥â9?Y"łƥƍģ"ěÍ%łƥegĄ"Ĕ·2ŧ»źĵĬĖiĮ0Ģè"ĭ+iĮƐ -ã·ľy -ĵĬ/łƥƍģ"ř 60%!"É¡ķ łƥegĄ ć)0ţ -0SêYĜ"łƥegĄ!#H5OCFƁuŏ!,.uàŀĜ!
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56

「第62回 大気環境学会年会 講演要旨集
令和3年(2021年)9月15日(水)～9月17日(金) オンライン開催(公社)大気環境学会 学術賞(斎藤潔賞)受賞記念講演」

ƑóůĔY!Ɯđ¦łƥĉĿƐ Şűķ!ñÚ ©2ŃóƓ ËÍ ³Ƨ 2ƨ
1980 ÊaYó-"Ē½s#óƓ!Ɯđ¦łƥ"egĄ fV/ - £yâ{Ɛ"Ē½!,/ţ -0
1990 ÊaŚĹ - 2000 ÊaÒ"Ɯđ¦łƥĉĿƐ"¨#óƓ!Ɯđ¦łƥegĄ Uíz´!#YŀĜ"É¡ķ#p!'Ɖ/ -Y! /łƥ
â{Ɛ"¨!Ž/ŵî/  /2000 ÊaYó -"ĉĿƐ"Ē½s#Ɯđ¦łƥ"egĄ"fV2d/ -Y! /â{Ɛ"Ē½!ÐƝ
0*"ãĔ0/łƥegĄ2ĮĵĬĖºW
Ĩ"ãűŜù#ƑÀ!ĉĿ/łƥ!)/Y! /ŀĜĢĠįöłƥ" 1990 Êa"ř 40% - 2000 ÊaYƞ!# 60%!'¨2Ń"ÒYĜ"ºWĨ#fV"#Y! /\ƍłƥâ{Ɛ"Ē½Ŷķ/łƥegĄ"Ĕ·Ď#ƃÊƜÈ!œm! .ƇşIOR¢ġ|Ű9?:OJF;MIegĄżƐ|øŪŢī§ųè"Ĕ·!Sťķ!Į-0/łƥ"ĕ×ĉĿƐ# ÷4>4 £! *Ē½s!/ Āŕ!Ąƀ
Fig. 2 Long-term variation of sulfur sources in0$kğƣĆė!.łƥ# PM2.5 ŏ"Ŗ²ĥ
the atmospheric deposition collected atģż"[ŭÞ|/ -0-"ĵĬĖØ¤2ÓNagaoka. In the estimation, 20.3, 6.6 and -2.7‰
are used for the d34S values of sea-salt (ss), coal/àĂ'­ą -ĬÜŗ&"łƥ"ŉ2Ƅſcombustion(cc) in Asian Continent and local/àĎ*eg"ďĮ óÑ0/
anthropogenic activities in the study area (la).

ÛŸŁŌvť!éĚľoqī§ňµŁŌß"ĸýõƏq®ƋtĬĳ¿ƋtĬ2#)vī§ŁŹc"ŶûŁŌ2åäōī§ŁŌß"tĬê êī§ŁŌß"ĸýê'À¿­µ! Ƒó!1.egŁŌ!á¼ìVƌ¸tĬX%!TÍĺ"Ŕ2ē Ƃ u004>4­ąĈúŁŌAPBR"ĸ3!ÔńİU'çħ
1. ­čăƩŅÃŘ¯Ʃü¿ĶƩę¿hƘƩìVƌ¸ƩłƥegĄ -Ů­ąƕVģYłƥ"jŝĖƪéĚľ"¥ƪƩìôµcŴƩ1991Ʃ675-681 (1991).
2. ­čăƩŅÃŘ¯ƩìVƌ¸ƩłƥegĄ2~Į­ąƕVģYłƥ"jŝĖºWĨ"ã·ƩìôµcŴƩ1994Ʃ822-827 (1994).
3. ­čăƩŅÃŘ¯ƩéĚľ! /­ąƕVģY"ĆĘ×ICģ57P"ěÍ ,%ĉĿƐƩìôµcŴƩ1996Ʃ427-430 (1996).
4. þ¾o²ƩŅÃŘ¯Ʃ­čăƩü¿ĶƩéĚľ! /­ąƕVģYANP"´ő©"jŝĖƩ­ąī§µcŴƩ30Ʃ276-283 (1995).
5. T. Ohizumi, N. Fukuzaki and M. Kusakabe, Sulfur Isotopic View on the Sources of Sulfur in Atmospheric Fallout
along the Coast of the Sea of Japan, Atmospheric Environment, 31, 1339-1348 (1997).
6. Z¿ƗƘƩ­čăƩŊÀūƩĻÿƩŅÃŘ¯Ʃ]^ƩõƏq®ƋƩìVƌ¸ƩY ,%ìôiĮ0/ŀĜŀĊ"łƥegĄƩìôµcŴƩ2000Ʃ45-51 (2000).
7. Tsuyoshi Ohizumi, Naoko Take, Noboru Moriyama, Osamu Suzuki and Minoru Kusakabe, Seasonal and spatialvariations in the chemical and sulfur isotopic composition of acid deposition in Niigata Prefecture, Japan, Water,
Air and Soil Pollution, 130, 1679-1684 (2001).
8. Tsuyoshi Ohizumi, Naoko Take, Yayoi Inomata, Hiroyuki Yagoh, Tomomi Endo, Masaaki Takahashi, Kazuki
Yanahara, Minoru Kusakabe, Long-term variation of the source of sulfate deposition in a leeward area of Asian
continent in view of sulfur isotopic composition, Atmospheric Environment, 140, 42-51 (2016).

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