Đánh giá giá trị Nitơ Đioxit (NO2) đối lưu tại Việt Nam giai đoạn 2010-2020

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Hoàng Gia Huy Nguyễn, Thị Hoa Nguyễn, Thị Tuyết Nam Nguyễn, Phước Tân Trần

Ngôn ngữ: Vie

Ký hiệu phân loại:

Thông tin xuất bản: Khí tượng Thủy văn 2023

Mô tả vật lý: 37-48

Bộ sưu tập: Metadata

ID: 410710

Thêm vào giỏ Liên kết toàn văn

Nitơ đioxit (NO2) đối lưu là tổng lượng phân tử NO2 trên một đơn vị diện tích trong cột khí quyển tính từ bề mặt Trái đất đến tầng đối lưu. Trong nghiên cứu này, giá trị NO2 đối lưu truy xuất từ cảm biến OMI của vệ tinh AURA được thu thập nhằm đánh giá diễn biến theo thời gian và sự phân bố theo không gian địa lý của NO2 đối lưu trên toàn Việt Nam giai đoạn năm 2010-2020. Mối liên hệ giữa NO2 đối lưu và các yếu tố kinh tế - xã hội cũng được đánh giá dựa vào phương pháp phân tích cụm phân cấp. Kết quả nghiên cứu cho thấy giá trị trung bình của NO2 đối lưu tại Việt Nam dao động nhẹ trong giai đoạn năm 2010-2020. Ngoài ra, giá trị NO2 đối lưu đạt cao nhất vào mùa khô, đặc biệt là tháng 3 và tháng 4, và giảm dần vào mùa mưa (từ tháng 5 đến tháng 9). Bên cạnh đó, khu vực đồng bằng sông Hồng và Nam Trung Bộ lần lượt có giá trị NO2 đối lưu cao nhất và thấp nhất so với các khu vực còn lại của cả nước. Kết quả phân tích cụm phân cấp cho thấy NO2 đối lưu có mối liên hệ với mật độ dân số, số lượng dân số, và thu nhập bình quân theo đầu người, đặc biệt tại miền Bắc và miền Nam. , Tóm tắt tiếng anh, Tropospheric nitrogen dioxide (NO2) indicates the total number of NO2 molecules per unit area in a column of atmosphere from the ground surface to the tropospheric layer. In this study, tropospheric NO2 data retrieved from the OMI sensor onboard the AURA satellite was used to investigate the spatial and temporal variation of tropospheric NO2 in Vietnam from 2010 to 2020. Additionally, relationships between the tropospheric NO2 and several socio-economic parameters, including average income, population density, number of populations, and index of industrial production, were evaluated using hierarchical cluster analysis to understand the effect of these parameters on the tropospheric NO2 in Vietnam. The results revealed that the average tropospheric NO2 over Vietnam experienced a moderate fluctuation between 2010 and 2020. In addition, the dry season (i.e., March and April) and rainy season (i.e., May to October) tended to have the highest and lowest values of tropospheric NO2, respectively. Regarding the spatial variation, the highest and lowest tropospheric NO2 values were observed in the Red River Delta and the South-Central Coast of Vietnam, respectively. Based on the hierarchical cluster analysis, tropospheric NO2 in the northern and southern areas showed relationships with population density, number of populations, and average income. This study thus provides information about tropospheric NO2 in Vietnam over a long-term period and supports decision-making related to reducing NO2 pollution.

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