This paper describes the implementation of a sensor network to monitor meteorological and hydrological conditions in Yosemite National Park. The sensor network, consisting of 20 instruments, was designed to be low-maintenance, low-powered, and unobtrusive. It measured water levels, temperatures, conductivities, snow depth, and radiation over several years in the Merced and Tuolumne River basins. The data collected helped scientists better understand changes in snowmelt patterns and their impacts on streamflow in the region. However, the paper did not provide many technical details about the sensor network itself.

1. MeteorologyandHydrologyin
YosemiteNationalPark:ASensor
NetworkApplication
A Review
Jessica D Lundquist, Daniel R. Cayan, and Michael D. Dettinger
Prepared by:
Sheila May E. Jungco
ME ECE – MO
Department of Electrical and Electronics Engineerin
University of San Carlos, Cebu City, Philippines

2. Aboutthe Paper
 PaperTitle: Meteorology and Hydrology inYosemite National
Park:A Sensor Network Application
 Date of Published: 2003
 Published in:
 Book title: Information Processing in Sensor Networks
 Pages :518-528
 Publisher: Springer Berlin Heidelberg
 Total Citations: 88 times
Reference:
http://scholar.google.com.ph/citations?view_op=view_citation&hl=en&user=JbFKaYUAAAAJ&cstart=20&citati
on_for_view=JbFKaYUAAAAJ:3fE2CSJIrl8C

3. Aboutthe Authors
Jessica D. Lundquist
• Professor of Civil and Environmental Engineering, University of
Washington
• Research focuses on spatial patterns of snow and weather in the
mountains and how those patterns are likely to affect stream flow and
water resources in a changing climate.
• 2002-2013 (39 publications)
Daniel R. Cayan
•ClimateAtmospheric Science and Physical Oceanography (CASPO)Scripps
Institution of Oceanography andWater Resources Discipline, U.S.Geological Survey
•Research interest: Seasonal – inter decadal climate variations, climate change, and
climate impacts on water, wildfire, health, and agriculture in California and western
North America
• 1980 – 2013 (137 publications)
Michael D Dettinger
• Research Hydrologist, US Geological Survey
• Research focuses on hydrology, climate, and water resources of the
West, focusing on regional surface water and groundwater
resources, hydroclimatic variability, and climate-change impacts.
• 186 publications

4. Yosemite
NationalPark
California National Park Map
Yosemite National Park Sierra Nevada
Optional text here
www.images.google.com

5. Overview
Of the Paper
www.images.google.com

6. Yosemite
NationalPark
Map
Merced River andTuolumneGrove
www.images.google.com

7. The Problem(s)
 Few measurements exist
FACTORS:
 Severe terrain
 Remote area
 Limited access
 Area of study is in Protected areas
SOLUTION:
A monitoring system that of low maintenance, low powered and
unobtrusive
The paper is addressing the
following problems.

8. Overview
Naturally most of the data
gathered for studies are
from areas accessible and
mostly in the less elevated
area.

9. Overview
Test Basins: Merced River andTuolumne River inYosemite national
Park (Highway 120)
Elevation: 1200 to 3700 m
Why Merced River?
-because it has a long daily record (1916-present)

10. Yosemite
NationalPark
Map
Merced River andTuolumne River
www.images.google.com

11. Time line
Water level
Conductiviti
es
Temperatur
es
Snow depth
and
Downward
Shortwave
Radiation
(CDWR)
Obtained
permit,
Installation of
20 instrument
forWater level
and
temperature
in MR andTR
,Deployment
of 4
conductivity
sensor
Stream chemistry
measurements, and
25 internally
recording
temperature/relative
humidity sensors
(highway 120)
10 water pressure
sensor
Published
20032002200120001999
Water level Conductivities Temperatures

12. 2002 Existing
Stations
www.images.google.com

13. Results

14. Results

15. Results

16. Results

17. Results

18. Data Logger
 Specifications
 Battery-powered
 32MB MemoryDeveloped by DouglasAlden

19. Review
Commentary and Recommendation

20. The Novelty
What is new?
The application of sensor network in meteorological and
hydrological study of change in snowmelt runoff inYosemite
National Park. However we cannot say that there is novelty
claimed by the authors.
Novelty applies to:
The device used so it can be suitable to the requirement the
authors specifications. (Low maintenance, low-powered,
unobtrusive, the circuit design. etc.)
What is new?

21. SimilarWorks
 Cayan, Daniel R., Michael D. Dettinger, SusanA. Kammerdiener,
Joseph M. Caprio, David H. Peterson, 2001: Changes in the Onset
of Spring in the Western United States. Bull. Amer. Meteor. Soc.,
82, 399–415.
 Dettinger, Michael D., Daniel R. Cayan, 1995: Large-Scale
Atmospheric Forcing of RecentTrends toward Early Snowmelt
Runoff in California. J.Climate, 8, 606–623.
 Stewart, I.T., D.R. Cayan, M.D. Dettinger, 2002. Changes in
Snowmelt RunoffTiming inWestern North America under a
“Business as Usual” Climate Change Scenario. Submitted to
Climate Change 10/31/02.
No research prior to this that uses
sensor network for meteorological
and hydrological application.

22. Update 2008

23. Update 2008
DanCayan and DouglasAlden

24. Strength and
Weaknesses
 Plus
 The implementation of the prototype of sensor network in this study
opens to wide area of researches and better numerical models for
the climate change .
 CON
 The authors did not include details about the type of sensor or any
technicality about it.
 The title is broad.
 The study did not clearly state the method of how they collected the
data using the data logger.
 It is more focus on the meteorological and hydrological side than of
the sensor network.
 Some figures as published are not coherent with his discussion.
 No detail about the network and how it was implemented and all
the technicality in engineering side.

25. Recommendations
 It could have been better if the sensor network
developer, Douglas Alden, co-authored with this article
to have support the science.

26. Update

27. Thank you!
Queries.