东京的空气质量

东京的空气质量指数(AQI)和PM2.5空气污染

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带有彩色AQI图标的IQAir地图

空气质量提供者和数据来源

数据来自

数据提供者

1

数据来源

1

Atmospheric Environmental Regional Observation System (AEROS)的主页标志Atmospheric Environmental Regional Observation System (AEROS)的主页标志

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天气

东京现在的天气怎么样?

天气图标
天气多云
温度57.2°C
湿度45%
风速和风向13.8 mp/h
气压1007 mb

实时AQI城市排名

实时日本 热门城市排名

#city美国 AQI
1 Kusuchominamigawa, Mie

152

2 Kaminowari, 山梨县

134

3 Katayanagi, Saitama

134

4 Kukichuo, Saitama

134

5 Arimuracho, Kagoshima

129

6 Higashichichibu, Saitama

129

7 Takakura, Saitama

127

8 Toyocho, Aichi

127

9 四日市市, Mie

127

10 Yakyūcho, Saitama

124

(当地时间)

查看世界AQI排名

实时东京 AQI排名

实时东京空气质量排名

#station美国 AQI
1 Nishisugamo,

97

2 Haruecho

95

3 Otsuka

95

4 Ojima

91

5 Ministry of the Environment 2

88

6 Higashimukojima

86

7 Kameido

86

8 Naitomachi north

86

9 Kanda Tsukasamachi

84

10 Oji

84

(当地时间)

查看世界AQI排名

东京 的网络图像

7:33, 1月 16

东京 有空气污染吗

7:33, 1月 16东京 的网络图像缩略图

美国 AQI

74

实时空气质量指数(AQI)
中等

表示AQI等级的人脸

概览

东京现在的空气质量指数(AQI)是多少?

空气污染等级空气质量指数(AQI)主要污染物
中等 74 美国 AQItrendPM2.5
污染物浓度
PM2.5
23 µg/m³trend
pm10
32 µg/m³trend
no2
62 µg/m³
so2
2.6 µg/m³
co
687 µg/m³trend

健康建议

东京空气污染,如何做好防护?

开窗图标请关窗以防止室外脏空气进入室内
骑车图标敏感人群应减少室外运动

预报

东京空气质量指数(AQI)预报

污染等级天气温度风速和风向
星期三, 1月 13

中等 59 美国 AQI

表示AQI等级的人脸
星期四, 1月 14

中等 56 美国 AQI

表示AQI等级的人脸
星期五, 1月 15

中等 61 美国 AQI

表示AQI等级的人脸
今天

中等 72 美国 AQI

表示AQI等级的人脸
天气图标57.2°42.8°
风向246度流动

6.7 mp/h

星期日, 1月 17

优秀 32 美国 AQI

表示AQI等级的人脸
天气图标44.6°37.4°
风向25度流动

6.7 mp/h

星期一, 1月 18

优秀 38 美国 AQI

表示AQI等级的人脸
天气图标42.8°33.8°
风向9度流动

6.7 mp/h

星期二, 1月 19

优秀 12 美国 AQI

表示AQI等级的人脸
天气图标42.8°33.8°
风向340度流动

20.1 mp/h

星期三, 1月 20

优秀 25 美国 AQI

表示AQI等级的人脸
天气图标41°32°
风向20度流动

6.7 mp/h

星期四, 1月 21

优秀 49 美国 AQI

表示AQI等级的人脸
天气图标48.2°35.6°
风向314度流动

0 mp/h

星期五, 1月 22

中等 58 美国 AQI

表示AQI等级的人脸
天气图标50°41°
风向34度流动

4.5 mp/h

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历史

东京历史空气质量图表

如何更好地远离空气污染侵害?

减少您在东京 空气的污染暴露值

东京 空气质量分析和数据

Is Tokyo a polluted city?

Tokyo, or officially Tokyo metropolis, is the capital city of japan and the most populous city in the country, with some 14 million inhabitants living there. Formerly known as Edo, it was once a fishing village that came to major political and cultural prominence due to the Tokugawa Shogunate making it its seat of power in the early 17th century. Nowadays Tokyo is a very technologically advanced city, being the leader in Japan's business and finance sector.

In regards to its air pollution levels, Tokyo came in with PM2.5 readings of 11.7 μg/m³ as an average over the year of 2019, putting it into the ‘good’ ratings bracket of air quality, which requires a PM2.5 reading of anywhere between 10 to 12 μg/m³ to be classified as such, a grouping that has a very fine margin of entry. This reading is a somewhat respectable one, with many months out of the year coming within the World Health Organizations target goal of 10 μg/m³ or less on the PM2.5 readings chart.

Its yearly average of 11.7 μg/m³ was enough to place it in 1924th place out of all cities ranked worldwide, as well as 225th place out of all cities ranked in Japan. This is a very respectable placing, with a good year round quality of air, although it can be said that the air quality is not yet perfect, with some months rising up by several units into the ‘moderate’ ratings bracket. As such, whilst Tokyo is very clean, it has some pollutive issues that may need addressing, but overall has a good quality of air for its citizens to breathe.

What are the main causes of pollution in Tokyo?

Due to rapid urbanization and industrialization that occurred over the last century, Tokyo has undergone vast changes to its urban geography, and whilst the levels of pollution may have lowered when compared to its more heavily industrialized time, there are still many causes of pollution that are remnants of this era, with many factories and industrial areas responsible for putting out larger amounts of pollution, thus raising the PM2.5 and PM10 count in the air, as well as emitting other noxious chemicals such as nitrogen dioxide (NO2) and sulfur dioxide (SO2).

So, with this in mind, one of the main causes of pollution in Tokyo would be emissions from factories, particularly ones that still run on forms of fossil fuels such as coal, although this is significantly less prominent than other countries, due to the more stringent regulations that Tokyo authorities place on fuel standards. Nevertheless, these emissions still add to the year round ambient pollution levels.

Lastly, the other main source of pollution in Tokyo would be that of vehicular emissions, with some 4 million vehicles being registered in the city in 2014, and as such would have grown significantly since. Whilst rules for what fuels can be used are very strict, the large amount of vehicles on the road would still lead to a heavy increase in pollution levels, far greater than what would be recorded if there were to be less cars and other automobiles on the road.

When is Tokyo’s air at its most polluted?

Observing the data taken over 2019, it can be seen that Tokyo is subject to some quite sporadic readings of PM2.5, with three different groupings coming in over the course of the year, including the WHO’s target goal, the ‘good’ rating bracket as well as the ‘moderate’ ratings bracket, which requires a PM2.5 reading of anywhere between 12.1 to 35.4 μg/m³ to be classed as such.

To see a pattern emerge, it appears that despite its sporadic and random nature, the months of January through to August came in with the highest readings of pollution, as well as December falling in line with these months.

The most polluted month of the year by far was February, with a PM2.5 reading of 17.4 μg/m³, followed by March and December with readings of 13.9 μg/m³ and 13.4 μg/m³ respectively.

When is Tokyo's air quality at its cleanest?

In contrast to the previous question, the months that came in with the cleanest readings of pollution were towards the end of the year, with the exception of December which came in with a relatively high reading despite its proximity to the cleanest months of the year.

September through to November were the months that came in with the lowest levels of pollution, with readings of 9.4 μg/m³, 8.9 μg/m³ and 9.8 μg/m³ respectively, making October the cleanest month out of the year, with a good quality of air for its inhabitants to breathe.

Have pollution levels in Tokyo improved?

Observing data taken over the last few years, it can be seen that Tokyo's pollution levels have made some good improvements, and although they may be marginal in terms of the amount of PM2.5 units involved, when pollution levels are as low as ones such as in Tokyo and other similar clean cities, these minute changes can make a world of difference.

In 2017, Tokyo came in with a PM2.5 reading of 13 μg/m³, placing it in the moderate ratings bracket. This was followed in 2018 by a reading of 13.1 μg/m³, showing a slight increase in pollution levels. In more recent times the aforementioned reading of 11.7 μg/m³ was shown in 2019, that moved the cities reading down by a whole bracket from moderate to good.

If this trend is to continue, with the right initiatives in place (which are already being efficiently implemented), then hopefully Tokyo may be able to reduce its pollution levels further to the point that it finds itself within the WHO’s target goal for clean air year round.

What are some pollutants found in the air in Tokyo?

With the main sources of pollution being vehicle fumes as well as factory emissions, the main pollutants would be the ones such as the previously mentioned nitrogen dioxide and sulfur dioxide, with nitrogen dioxide being particularly prominent in areas that see high volumes of traffic.

Other pollutants would include fine particulate matter such as black carbon, a major component in soot and a dangerous form of PM2.5, having both carcinogenic and climate changing properties. Volatile organic compounds would also be present, released from cars, factories as well as industrial materials or even household items such as paints, varnishes, lacquers and combusted material such as coal or fuel.

Some examples of these would include benzene, toluene, formaldehyde and ethylene glycol. All of these have numerous detrimental effects on human health, and as such when pollution levels are higher in the air, preventative measures such as the wearing of fine particle filtering masks and avoiding outdoor activities or sports may become of increased importance.