水平能见度

1
电子、通信与自动控制技术
- horizontal visibility
  Experimental observation was taken at Xi'an for profiling the optical properties of atmospheric aerosols and horizontal visibility.
  系统对西安城区进行了斜程大气气溶胶廓线探测和水平能见度的连续观测。
2
地球科学
- horizontal visibility

1
光学厚度与地面水平能见度不呈简单的对应关系。
There is no simple one-to-one correspondence between optical depth and surface horizontal visibility.
2
本文还探讨了大气气溶胶光学厚度与水平能见度以及沙尘天气之间的关系。
The relationships between atmospheric aerosol optical thickness and horizontal visibility as well as the dusty weather were discussed.
3
吹灰尘组成的尘埃引起的风，中度高地地面和限制水平能见度小于7公里。
Blowing dust consists of dust raised by the wind to moderate heights above the ground and restricting horizontal visibility to less than 7 miles.

水平能见度
水平能见度（horizontal visibility）是指视力正常的人在当时天气条件下，能够从天空背景中看到和辨认出的目标物（黑色，大小适中）的最大水平距离；夜间是能看到和确定的一定强度灯光的最大水平距离。水平能见度与空气质量密切相关，可作为衡量大气环境质量的重要指标，其对航空、陆上和海上交通以及人们的日常生活都有影响。

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