optimized fractional cloudines determination from five ground-based remote sensing techniques or
DESCRIPTION
Optimized fractional cloudines determination from five ground-based remote sensing techniques Or What is the average of Yes and No? [ presentation Vaisala award 2012 ] R. Boers 1 , M. de Haij 1 , W. Wauben 1 , H. Klein Baltink 1 , B. v Ulft 1 , M. Savenije 1 , C. Long 2 1 KNMI, Netherlands - PowerPoint PPT PresentationTRANSCRIPT
KNMI, Vaisala, Brussels, 18-10-2012
Optimized fractional cloudines determination from five ground-based remote sensing techniques
OrWhat is the average of Yes and No?
[presentation Vaisala award 2012]
R. Boers1, M. de Haij1, W. Wauben1, H. Klein Baltink1, B. v Ulft1, M. Savenije1, C. Long2
1KNMI, Netherlands2PNL, USA
Special thanks to our managers!
1) Dr. F. Brouwer, Director of KNMI, Dutch Permanent Representative of WMO 2) Dr. B. v Oord, Head, R&D Infrastructure Department, KNMI3) Dr. R. v Oss, Head, Regional Climate Department, KNMI
KNMI, Vaisala, Brussels, 18-10-2012
This is a talk about climate monitoring………… with a potential conflict between
1) Free data access and 2) Budget restrictions
KNMI, Vaisala, Brussels, 18-10-2012
Let’s talk about your neighbour….He/she ..
• Is computer literate, has PC• Has internet connection• Is interested in climate and weather• Is sceptical about climate change• Knows about free data access; after all: he/she is a law-
abiding citizen and taxpayer, and deserves to have access
• Knows how to make a graph or two with .xls• Has some free time on his/her hands
KNMI, Vaisala, Brussels, 18-10-2012
What is the chance that he/she will think:
• It’s published on the Internet, therefore it must be true.
I have found climate change!
If I can make this graph with little problems: Why haven’t those guys at the Weather Service picked this up?
What are they doing up there?
KNMI, Vaisala, Brussels, 18-10-2012
A management decision
Climate change
Climatechange
true truetrue
KNMI, Vaisala, Brussels, 18-10-2012
• So, the graph conveys two truths:
1) About climate change
2) About a management decision to change observations
• Your neighbour is asked to discern between these two truths.
KNMI, Vaisala, Brussels, 18-10-2012
For the interpretation of these type of graphs you need climate monitoring
experts. What are the perfect qualifications? 1) Start Young, Die Old2) Autistic /Myopic3) Asocial4) Micromanager5) Ultraconservative6) Ultrapersistent7) No ambition, no upward mobility8) No wish to publish anything9) Low pay not a problem10) No internet connection, no Twitter, 11) No Facebook
• Be a nerd!!!
KNMI, Vaisala, Brussels, 18-10-2012
A Ceilometer is a colourblind Observer with a telescope and a serious spinal injury
KNMI, Vaisala, Brussels, 18-10-2012
The Observer
The Ceilometer
With a ceilometer, it’s either Yes or No.The average of Yes and No does not exist.
KNMI, Vaisala, Brussels, 18-10-2012
Is a Ceilometer the solution to continue cloud monitoring for climate purposes? Only in a very limited sense. It is a
columnar method.
Can we find better ways? Yes, we can!
We have proven that hemispheric methods yield results that better emulate the Observer.
Suggested solution: A sky scanning IR
radiometer: Nubiscopecombined with a
Scanning ceilometer