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Reliability of the Pollutant Release and Transfer Register Data in Terms of the Employed Estimation Techniques
Get PDFThis paper discussed the reliability of the reported release and transfer of chemical substances under the Japanese Pollutant Release and Transfer Register (PRTR) in terms of the estimation techniques.Our questionnaire surveys to PRTR-reporting facilities revealed the following. The reported releases/transfer to public water bodies, soil, on-site landfill, and sewage treatment were reported as zero in most cases due to that no releases/transfers were expected at the facilities. Regarding the release to air and the transfer to waste treatment, in half the cases where the reported data estimated based on mass balance (10% of the total reported data), the releases/transfers occupy less than 0.01 of the production/use amounts, suggesting that these data may deviate from the actual amount by one order of magnitude. Half of the reported data estimated using direct monitoring (5% of the total reported data) were not sufficiently reliable because they were based on annual or biannual measurements, even though the emission concentration variations were unknown. Approximately 30-40% of the reported data estimated using emission factors (10% of the total reported data) were based on the factors from literature or unknown sources. The reliability of these releases/transfers depends on the applicability of the factor to individual facility.This is the authors’ provisional translation of the following Japanese original article published in Environmental Science (Kankyo-kagaku-kai-shi) by the Society of Environmental Science, Japan
Oguchi, M., Okubo, S., Tanikawa, N., Nakamura, S., 2022.Environmental Science (Kankyo-kagaku-kai-shi), 35(4): 189–198.
doi of the Japanese original article: 10.11353/sesj.35.189journal articl
第37回全国環境研究所交流シンポジウム予稿集
Get PDF「全国の環境研究から見える未来」
2022(令和 4)年2月16日(水)～2月17日（木）
於 オンライン開催conference proceeding
Spatiotemporal changes in water quality in the Seto Inland Sea from 1981 to 2015: Analyses of public survey data
Get PDFpdfLong-term changes (from the 1980s to 2010s) in the water quality of the Seto Inland Sea, a semi-enclosed bay system in southwestern Japan consisting of 12 sea regions, were determined by analyzing public survey data. The average bottom water temperature (BWT) from 2010 to 2014 differed among the sea regions, for example, in January,it was lowest at Harima Nada and Bisan Seto (7.3-10.0℃) and highest in Kii Suido and Bungo Suido (11.5-14.4℃).BWT ranged from 15.0 to 23.3℃ in May and July, and from 22.5 to 25.2℃ in October. The spatial distribution of cold- or warm-water bodies corresponded well to those of high-salinity waters, indicating penetration of the Kuroshio Current from the Pacific Ocean. BWT increased significantly from the 1980s to 2010s in most sea regions and seasons.The overall mean increase in BWT was the largest in October (+5.82℃ 100-yr^), especially in Osaka Bay and Hibiki Nada (+9.25 and +9.10℃ 100-yr^, rspectively). Hypoxic bottom water (dissolved oxygen [DO] ) occurred mainly in inner Osaka Bay in May, July, and October. From the 1980s to 2010s, the bottom DO gradually increased in five sea regions in July, but decreased in Kii Suido and Osaka Bay in October, which may partly be due to the rising BWT in autumn. The chlorophyll a concentration d creased significantly from the 1980s to 2010s in two to eight regions in January, May, July, and October. By contrast, chlorophyll a increased significantly in Harima Nada (January, July, and October), Bisan Seto (January and May), and Bingo Nada (January).本報文は、過去の行政調査データを用いた1981～2015 年の瀬戸内海における水質項目の時空間変動解析結果をまとめたものであり、平成28 年度～平成30 年度に実施された環境省「閉鎖性海域における気候変動による影響把握等検討業務」 および令和元年度～令和3 年度に実施された環境省「閉鎖性海域における気候変動による影響評価及び適応策等検討業務」において実施された解析結果を含んでいる。boo
APBON Highlights 2022
Get PDFAPBON at a glance
Summary of APBON’s plan for 2023–2025
Strengthening observations and proceeding data sharing
Stakeholder engagement and capacity development
Contribution to national, regional and global efforts
Activity Highlights
Findings and Challengesboo
Prediction Dataset of Climate Change Impact on Water Environment in the Seto Inland Sea
No full textnetCDF4 (日平均値, 月平均値, 気候値)
Shapefile & csv (気候値)netCDF4 (daily, monthly, climatology)
Shapefile & csv (climatology)200～1,400MB (netCDF4)
3～17MB(Shapefile & csv)本データセットは、陸域ー海域モデルを用いて気候変動が瀬戸内海の水環境に及ぼす影響を予測した結果が収録されています。気候シナリオには「地域気候変動予測データ」（環境省, 2014）等を使用し、現在気候20世紀末および4つの将来気候21世紀末（RCP 2.6，4.5，6.0，8.5）について、それぞれ20年分の数値シミュレーションを行っています。予測の概要はこちらをご覧ください。
This dataset contains the numerical predictions of climate change impacts on water environment in the Seto Inland Sea. The predictions were performed for the present climate at the end of the 20th century and four future climates (RCP 2.6, 4.5, 6.0, and 8.5) at the end of the 21st century.【データ項目】
物理: 海面水位, 東西流速, 南北流速, 水温, 塩分
水質: COD, TN, TP, DO, TOC, Chl.a (3種), 無機態物質 (NH4-N, NO3-N, DIP, Ad-P), 懸濁有機態物質 (POC, PON, POP), 溶存有機態物質 (DOC, DON, DOP)
【気候】
現在気候: 1984.09.01-2004.08.31
将来気候（RCP2.6, 4.5, 6.0, 8.5）: 2080.09.01-2100.08.31
【空間分解能】
基準地域メッシュ（経度方向45秒, 緯度方向30秒）
【時間分解能】
日平均値, 月平均値, 気候値
【データ形式】
３次元netCDF, 表層・底層２次元netCDF, Shapefile & csv (現在気候と将来気候RCP8.5の表層・底層2次元気候値データのみ)
【Output data items】
Physical: sea surface height, eastward velocity, northward velocity, sea temperature, salinity
Water quality: COD, TN, TP, DO, TOC, Chl.a (3 kinds), inorganic matter (NH4-N, NO3-N, DIP, Ad-P), particulate organic matter (POC, PON, POP), dissolved organic matter (DOC, DON, DOP)
【Climate】
Present climate: 1984.09.01-2004.08.31
Future climate (RCP2.6, 4.5, 6.0, 8.5): 2080.09.01-2100.08.31
【Spatial resolution】
Reference area mesh (45 sec. in longitude, 30 sec. in latitude)
【Temporal resolution】
Daily, Monthly, Climatology
【Data Format】
3-D netCDF, Surface and bottom 2-D netCDF, Shapefile & csv (only for surface and bottom 2-D climatology datasets of the present and the RCP8.5 future climates)
【Output data items】
Physical: sea surface height, eastward velocity, northward velocity, sea temperature, salinity
Water quality: COD, TN, TP, DO, TOC, Chl.a (3 kinds), inorganic matter (NH4-N, NO3-N, DIP, Ad-P), particulate organic matter (POC, PON, POP), dissolved organic matter (DOC, DON, DOP)
【Climate】
Present climate: 1984.09.01-2004.08.31
Future climate (RCP2.6, 4.5, 6.0, 8.5): 2080.09.01-2100.08.31
【Spatial resolution】
Reference area mesh (45 sec. in longitude, 30 sec. in latitude)
【Temporal resolution】
Daily, Monthly, Climatology
【Data Format】
3-D netCDF, Surface and bottom 2-D netCDF, Shapefile & csv (only for surface and bottom 2-D climatology datasets of the present and the RCP8.5 future climates)observational dat
