Application of snow specific surface area measurement using an optical method based on near-infrared reflectance around 900-nm wavelength to wet snow zones in Japan

Satoru Yamaguchi, Hiroki Motoyoshi, Tomonori Tanikawa, Teruo Aoki, Masashi Niwano, Yukari Takeuchi, Yasoichi Endo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The specific surface area (SSA) of snow can be used as an objective measurement to define the optical sphere diameter of snow; it is therefore a helpful parameter to describe the physical properties of snow, such as albedo. Recently, measurement of snow SSA in the field has become easier with the use of optical methods based on near-infrared reflectance values (Ref). However, existing optical methods have only been validated for dry snow conditions in the field. In this study, we tested the possibility of applying the optical method using light with wavelength of around 900 nm (NIR photometry) to wet snow zones in Japan by comparing the findings with snow pit observation data. Our results indicated that NIR photometry can be applied to wet snow zones before the main melt season when the liquid water content is small, but problems arose during melt season due to the appearance of darker layers with more high liquid water content. To resolve these problems, we propose three improvements to NIR photometry: using three calibration targets ranging from high Ref to low Ref in coverage; establishing an estimation formula for SSA from measured Ref, including lower Ref values; and considering how water in the snow influences Ref.

Original languageEnglish
Pages (from-to)55-64
Number of pages10
JournalBulletin of Glaciological Research
Volume32
Issue number1
DOIs
Publication statusPublished - 2014
Externally publishedYes

Fingerprint

optical method
reflectance
near infrared
surface area
snow
wavelength
water content
melt
liquid
albedo
physical property
calibration

Keywords

  • Near-infrared reflectance of snow
  • Optical grain size
  • Snow specific surface area
  • Wet-snow

ASJC Scopus subject areas

  • Earth-Surface Processes

Cite this

Application of snow specific surface area measurement using an optical method based on near-infrared reflectance around 900-nm wavelength to wet snow zones in Japan. / Yamaguchi, Satoru; Motoyoshi, Hiroki; Tanikawa, Tomonori; Aoki, Teruo; Niwano, Masashi; Takeuchi, Yukari; Endo, Yasoichi.

In: Bulletin of Glaciological Research, Vol. 32, No. 1, 2014, p. 55-64.

Research output: Contribution to journalArticle

Yamaguchi, Satoru ; Motoyoshi, Hiroki ; Tanikawa, Tomonori ; Aoki, Teruo ; Niwano, Masashi ; Takeuchi, Yukari ; Endo, Yasoichi. / Application of snow specific surface area measurement using an optical method based on near-infrared reflectance around 900-nm wavelength to wet snow zones in Japan. In: Bulletin of Glaciological Research. 2014 ; Vol. 32, No. 1. pp. 55-64.
@article{56c01ae73cd644f6b574f7b4a10c3932,
title = "Application of snow specific surface area measurement using an optical method based on near-infrared reflectance around 900-nm wavelength to wet snow zones in Japan",
abstract = "The specific surface area (SSA) of snow can be used as an objective measurement to define the optical sphere diameter of snow; it is therefore a helpful parameter to describe the physical properties of snow, such as albedo. Recently, measurement of snow SSA in the field has become easier with the use of optical methods based on near-infrared reflectance values (Ref). However, existing optical methods have only been validated for dry snow conditions in the field. In this study, we tested the possibility of applying the optical method using light with wavelength of around 900 nm (NIR photometry) to wet snow zones in Japan by comparing the findings with snow pit observation data. Our results indicated that NIR photometry can be applied to wet snow zones before the main melt season when the liquid water content is small, but problems arose during melt season due to the appearance of darker layers with more high liquid water content. To resolve these problems, we propose three improvements to NIR photometry: using three calibration targets ranging from high Ref to low Ref in coverage; establishing an estimation formula for SSA from measured Ref, including lower Ref values; and considering how water in the snow influences Ref.",
keywords = "Near-infrared reflectance of snow, Optical grain size, Snow specific surface area, Wet-snow",
author = "Satoru Yamaguchi and Hiroki Motoyoshi and Tomonori Tanikawa and Teruo Aoki and Masashi Niwano and Yukari Takeuchi and Yasoichi Endo",
year = "2014",
doi = "10.5331/bgr.32.55",
language = "English",
volume = "32",
pages = "55--64",
journal = "Bulletin of Glaciological Research",
issn = "1345-3807",
publisher = "Japanese Society of Snow and Ice",
number = "1",

}

TY - JOUR

T1 - Application of snow specific surface area measurement using an optical method based on near-infrared reflectance around 900-nm wavelength to wet snow zones in Japan

AU - Yamaguchi, Satoru

AU - Motoyoshi, Hiroki

AU - Tanikawa, Tomonori

AU - Aoki, Teruo

AU - Niwano, Masashi

AU - Takeuchi, Yukari

AU - Endo, Yasoichi

PY - 2014

Y1 - 2014

N2 - The specific surface area (SSA) of snow can be used as an objective measurement to define the optical sphere diameter of snow; it is therefore a helpful parameter to describe the physical properties of snow, such as albedo. Recently, measurement of snow SSA in the field has become easier with the use of optical methods based on near-infrared reflectance values (Ref). However, existing optical methods have only been validated for dry snow conditions in the field. In this study, we tested the possibility of applying the optical method using light with wavelength of around 900 nm (NIR photometry) to wet snow zones in Japan by comparing the findings with snow pit observation data. Our results indicated that NIR photometry can be applied to wet snow zones before the main melt season when the liquid water content is small, but problems arose during melt season due to the appearance of darker layers with more high liquid water content. To resolve these problems, we propose three improvements to NIR photometry: using three calibration targets ranging from high Ref to low Ref in coverage; establishing an estimation formula for SSA from measured Ref, including lower Ref values; and considering how water in the snow influences Ref.

AB - The specific surface area (SSA) of snow can be used as an objective measurement to define the optical sphere diameter of snow; it is therefore a helpful parameter to describe the physical properties of snow, such as albedo. Recently, measurement of snow SSA in the field has become easier with the use of optical methods based on near-infrared reflectance values (Ref). However, existing optical methods have only been validated for dry snow conditions in the field. In this study, we tested the possibility of applying the optical method using light with wavelength of around 900 nm (NIR photometry) to wet snow zones in Japan by comparing the findings with snow pit observation data. Our results indicated that NIR photometry can be applied to wet snow zones before the main melt season when the liquid water content is small, but problems arose during melt season due to the appearance of darker layers with more high liquid water content. To resolve these problems, we propose three improvements to NIR photometry: using three calibration targets ranging from high Ref to low Ref in coverage; establishing an estimation formula for SSA from measured Ref, including lower Ref values; and considering how water in the snow influences Ref.

KW - Near-infrared reflectance of snow

KW - Optical grain size

KW - Snow specific surface area

KW - Wet-snow

UR - http://www.scopus.com/inward/record.url?scp=84906080753&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84906080753&partnerID=8YFLogxK

U2 - 10.5331/bgr.32.55

DO - 10.5331/bgr.32.55

M3 - Article

AN - SCOPUS:84906080753

VL - 32

SP - 55

EP - 64

JO - Bulletin of Glaciological Research

JF - Bulletin of Glaciological Research

SN - 1345-3807

IS - 1

ER -