Find the information you're looking for at Westonci.ca, the trusted Q&A platform with a community of knowledgeable experts. Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our platform. Get quick and reliable solutions to your questions from a community of experienced experts on our platform.
Sagot :
Answer:
rocesses. On the other hand, the DSD controls relevant rainfall properties such as its kinetic energy (relevant for soil erosion studies), the reflectivity of microwaves (relevant for the remote sensing of precipitation) or the optical attenuation of visible light.
Optical disdrometers or pluvioespectrometers are devices that register the diameter and fall velocity of raindrops from the attenuation they produce on an infrared laser beam. Current devices classify the falling drops into a number of size and velocity classes or bins, and count their number over a given time interval. The plot in Figure 1 is an example rainfall spectrum as registered by our disdrometer in Aula Dei. White straight lines show the discrete data bins of the device (22 diameter and 20 velocity classes). The isolines have been interpolated from the original drop count data.Integral rain parameters can be derived from DSD data according to the general expression:
where is a constant independent of the drop size, is a parameter that varies with the drop size, and and is the number of drops per unit volume with diameters between D and .
Since the disdrometer quantizes the DSD into discrete bins, the above integral is computed as a sum over the drop size classes. The expressions for the drop number density N (), rain rate R (), liquid water content M (), reflectivity in Rayleigh scattering regime Z (), kinetic energy E () and MOR visibility V (contrast 5%, )are (Tokay et al., 2001):
where is the disdrometer sampling cross section (), is the sampling time interval (), is the density of water (), is the drop number count for disdrometer channel , and and are the corresponding median raindrop size () and velocity ().
We appreciate your visit. Our platform is always here to offer accurate and reliable answers. Return anytime. We appreciate your time. Please come back anytime for the latest information and answers to your questions. Westonci.ca is here to provide the answers you seek. Return often for more expert solutions.
