为什么问用于特定湿度?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 07 - 07 - t23:21:08z //www.hoelymoley.com/feeds/question/2449 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/2449 10 为什么问用于特定湿度? naught101 //www.hoelymoley.com/users/56 2014 - 09 - 05 - t08:23:14z 2014 - 12 - 13 - t10:58:43z < p >问美元符号用于特定的湿度在许多教科书和报纸(至少在气象学和气候学,我不熟悉它在其他学科)。这个符号是从哪里来的,这代表什么呢? < / p > //www.hoelymoley.com/questions/2449/-/2450 # 2450 11 回答的BHF银行为什么问用于特定湿度? BHF银行 //www.hoelymoley.com/users/124 2014 - 09 - 06 - t07:09:36z 2014 - 09 - 06 - t07:09:36z < p >比湿q <强> < /强>是<强>商< /强>——大量的水蒸气在潮湿的空气的质量。表达的质量/体积,即水蒸气的密度\ rho_v美元和干燥的空气的密度\ rho_d美元用于商问美元的定义被称为特定的湿度:< / p > < p > $ $ q = \ dfrac {\ rho_v} {\ rho_v + \ rho_d} $ $ < / p > //www.hoelymoley.com/questions/2449/-/2461 # 2461 8 由wxguy回答为什么问用于特定湿度? wxguy //www.hoelymoley.com/users/857 2014 - 09 - 08 - t15:53:34z 2014 - 09 - 08 - t15:53:34z < p >我没能找到任何特定引用持有自己一样问美元的起源的标志选择特定的湿度,但“比湿”一词的起源本身似乎是1884年w·冯·Bezold博士的文章翻译成英文发表在< a href = " http://books.google.com/books?id=dEcWAAAAYAAJ&lpg=PA315&ots=-9iYTtreqm&dq=von%20bezold%20%22specific%20humidity%22&pg=PA327#v=onepage&q=von%20bezold%20%22specific%20humidity%22&f=false">Smithsonian Miscellaneous Collections (Vol. 51) in 1910, and is defined therein as a quantity:

the quantity of vapor contained in the unit mass of moist air which can be conveniently called the "specific humidity"

(p.327)

At that time, $q$ was not used, but instead von Bezold chose $y$ as the symbolic representation of specific humidity in his subsequent equations:

$y$ the specific humidity or the quantity of vapor in a unit mass of moist air expressed in the fractional parts of this unit.

(p.328)

The first appearance of $q$ as a symbol for specific humidity that I've found is in Chapter 5 of Physics of the Earth, Vol. 1 (p. 151), published in 1931. Here, the author uses $q$ to mean specific humidity as though it is common knowledge, using it in equations before even defining it for the reader:

This makes $q$ a readily determined and quite conservative characteristic of any unsaturated air mass.

Followed a few sentences later by:

The relative humidity $f$ together with the specific humidity $q$ and absolute humidity $\rho_{w}$ are the quantities commonly used as measures of the moisture content of the atmosphere.

(p.137)

This 1931 reference is likely not the earliest use of $q$ to mean specific humidity, but is the earliest I was able to uncover.

Thus, it would seem that the use of $q$ as a commonly accepted symbolic representation of specific humidity originated sometime between 1884 and 1931. It seems quite plausible that, given the use of the word "quantity" in defining the term originally (and in later references that I'm unable to add links for), the choice of $q$ as the symbol for specific humidity finds its source in this definition.

Additional reference: Temperature inversions in relation to frosts, McAdie, Alexander, Cambridge, 1915. (p.5) (Full text at Hathi Trust)

Baidu
map