© Crown copyright Met Office HumEx - HUMidty EXperiment Amanda Kerr-Munslow, Research Scientist, Cardington.

Slides:

Advertisements

Similar presentations

Weather Instruments These instruments are vital for collecting weather data. You will be tested on identification and function.

Advertisements

Page 1© Crown copyright 2004 Introduction to upper air measurements with radiosondes and other in situ observing systems [3] John Nash, C. Gaffard,R. Smout.

1 COPS Workshop 2008 University of Hohenheim, Stuttgart; 27 to 29 February 2008 IMGI‘s contribution to the COPS 2007 field experiment Simon Hölzl & Alexander.

01/14/2001Temperature and Humidity1 Temperature and Humidity Paul M. Fransioli, CCM AMS Short Course on Introduction to Measurements and Observation Techniques.

How do we measure relative humidity?

After completing this Lesson, you will be able to answer: 1. What is humidity? 2. What is relative humidity? 3. How relative humidity is measured? 4. What.

Application of ROTRONIC products in Concrete. Why measure ERH in Concrete? Checking concrete has dried (set) enough Determine the condition of old concrete.

© Crown copyright Met Office New UK AWS System On-going Work Mike Molyneux and Matt Clark.

What are the 6 tools we use to measure the weather?

Weather Instruments IGCSE Geography.

Department of Meteorology and Geophysics University of Vienna since 1851 since 1365 UnivVienna Instrumentation Manfred Dorninger and Reinhold Steinacker.

© Crown copyright Met Office An update on plans for CAVIAR field campaigns Stuart Newman NPL, 2 June 2008.

RADIOSONDE TEMPERATURE, HUMIDITY, AND PRESSURE RESPONSE AT LOW TEMPERATURES Stephen R. Hudson, Michael S. Town, Von P. Walden, and Stephen G. Warren 24.

Fire Weather: Temperature & Moisture. Weather and the Earth’s Heat Balance Weather = motion in the atmosphere due to unequal heating Over time, the amount.

© Crown copyright Met Office DIAMET & Met Office Kevin Linklater – Upper Air & Remote Sensing Networks Team Leader, Reading 9 th June 2011.

Class 9 - Relative Humidity, Dew, and Frost Points University of Maryland Baltimore County - UMBC Phys650 - Special Topics in Experimental Atmospheric.

Weather and Climate.

GLOBE Protocols. Steps: 1. Look in ALL directions of the sky for any clouds. *avoid sun* 2. Identify types of clouds using GLOBE cloud chart and Observing.

Are Altitude and Humidity Related? BY SIERRA RITTER.

Humidity - Humidity sensors - Vapour pressure and dew point temperature - Soil moisture sensors - Leaf wetness sensors.

1 Review of WMO test results on the accuracy of radiosonde relative humidity sensors John Nash Observing Methods Technology Centre, Development, Met Office.

Problems and measuring errors of radiosonde humidity measurements in the global aerological network and new possibilities of their correction and validation.

RESULTS OF THE WMO INTERCOMPARISON OF THERMOMETER SCREENS/SHIELDS AND HYGROMETERS IN HOT DESERT CONDITIONS Muriel Lacombe WMO CIMO-TECO 2010, 31 August.

GROUP MEMBERS Sutiana Allen Claudine Beckford Mitchell Yannike blackwood.

Weather Instruments TSW Identify weather instruments and explain how each is used in gathering weather data and making forecasts (thermometer, rain gauge,

Liam Tallis. Introduction Know the vertical distribution of water vapour in the atmosphere Profile for input into radiative transfer schemes Need to know.

Why do we need weather forecast? Weather forecast depends on the activities that we do each day. We are interested in the weather forecast to make our.

What Makes a Smart Controller “Smart”?. Definition “Smart controllers are irrigation clocks that automatically adjust irrigation run times in response.

© Crown copyright Met Office John Nash 1, Tim Oakley 1, Mark Smees 1, S.Kurnosenko 2 and Li Wei 3 1 Met Office, Fitzroy Road, Exeter, EX1 3PB, UK 2

Structural Drying Open enclosed areas (walls, floors) Drying may take several days or weeks.

Section 12.3 Gathering Weather Data

Radiosondes launched at NSA during the WVIOP04 VAISALA RS90 (operated by ETL and ARM) 4 times per day at the ARM duplex (00, 06, 12, 18 UTC) 1 time per.

Weather Instruments. Thermometer What does it do? What does it do? It measures the air temperature It measures the air temperature.

Weather Instruments By Christina Morgan V.. Barometer  A Barometer is an instrument that measures the air pressure. If you read the barometer and it.

Weather Instruments Can you name any instruments or tools used to predict or describe weather?

Add To Table of Contents:

Documentation of surface observation. Classification for siting and performance characteristics Michel Leroy, Météo-France.

Homework: Textbook pages #1-4. Follow the Low Pressure System.

PREDICTING THE WEATHER. Vocab  Meteorologist- scientist who study the causes of weather and try to predict it.  Isopleth- connected lines showing equal.

TOOLS USED TO MEASURE WEATHER I Anton Asuncion 8-Mandela.

Suitability of the new paradigm for winter observation of road condition Mr. Rok Kršmanc, Ms. Alenka Šajn Slak, Mr. Samo Čarman CGS plus d.o.o., Slovenia,

EOY Revision Form 4- Geography 1. The difference between the maximum and minimum temperatures recorded for a place during a period of one day is called.

–thermometer –barometer –anemometer –hygrometer Objectives Recognize the importance of accurate weather data. Describe the technology used to collect.

Virtual Academy for the Semi Arid Tropics Course on Crop-Weather Relationships Module III: Weather Elements There are 19 multiple choice questions in this.

Page 1© Crown copyright 2004 Development of a Ground Based GPS Network for the Near Real Time Measurement of Integrated Water Vapour (IWV) Jonathan Jones.

COLPEX; Cold Air Pooling over Complex Terrain Bradley Jemmett-Smith 1 st year PhD RMets Conference 10 th July 2010.

Weather Instruments How do they help in predicting weather?

Humidity Sensors Tests for F-Pixel

WEATHER INSTRUMENT BY CONNOR MCKENZIE. BAROMETER  A barometer is a tool that measures air pressure. On this one has a clock that is how it shows you.

Page 1© Crown copyright 2004 Meteorological Inputs Groundwater Workshop, Birmingham Murray Dale, 4/11/04.

Calculating Relative Humidity Practice Use table from MJ 2006 Paper 1 Q4.

AIRS science team meeting Camp Springs, February 2003 Holger Vömel University of Colorado and NOAA/CMDL Upper tropospheric humidity validation measurements.

Series RHP Temperature and Humidity Transmitter The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential.

Chapter 3: Air Temperature

Page 1© Crown copyright 2005 Met Office Verification -status Clive Wilson, Presented by Mike Bush at EWGLAM Meeting October 8- 11, 2007.

Weather Measurers By Benjamin Holmes.

Instructions for using this template. Remember this is Jeopardy, so where I have written “Answer” this is the prompt the students will see, and where.

Weather Instruments.

TS-CV-Detector Cooling 25/11/2004M. Battistin - JCOV 25 November JCOV 25 November 2004 Results for the plastic-fluorocarbon compatibility tests Status.

Page 1© Crown copyright 2004 Results of the RS92 Acceptance Test performed by the Met Office (UK) Richard Smout, John Nash, Mark Smees, Darren Lyth, May.

Hygrometry Part 2.

Experimental Comparison among the Psychrometer and the Two-Pressure Humidity Generator and the Dew Point Hygrometer Speaker: Jinpeng Fan Authors: Xueli.

Measuring Albedo. Type of surface cover Outgoing illuminance Incoming illuminance Albedo.

© Crown copyright Met Office The OPREC component of COPE (Orographic Precipitation Experiment) Jeremy Price, Met Office Research Unit, Cardington, Beds.

Weather Instruments.

WEATHER FORCASTING Key Words

What are they? What do they do?

Weather Instruments.

Instruments for measuring physical quantities of the environment Standard EN ISO 7726 Accepted in 2001 Marianna Luoma.

Meteorological Instrumentation

Presentation transcript:

© Crown copyright Met Office HumEx - HUMidty EXperiment Amanda Kerr-Munslow, Research Scientist, Cardington

© Crown copyright Met Office HumEx Table of Contents Why, what, where and when? General weather conditions Case studies Survival? Conclusions

© Crown copyright Met Office Why, what, where and when? To investigate the response of a variety of humidity sensors in high humidity conditions. How accurate are they? How good is their response rate? Do they survive?

© Crown copyright Met Office Why, what, where and when? Standard surface site 10m mast, radiation, soil, visibility, rain gauge, 1.2 m screen Chilled mirror instruments: Michell hygrometer with sintered metal cover to 04/10/2011 (MIC_OM) Michell hygrometer with plastic cover from 04/10/2011 (MIC_OP) Meteolabor Thygan hygrometer (THY_OO)

© Crown copyright Met Office Why, what, where and when? Aspirated Instruments (3m/s)Non-aspirated instruments Covered instruments Vaisala Humicap HMP44 (V44_AC) Vaisala Humicap HMP155 (V15_AC)* Rotronics Hygroclip (Rot_AC) Rotronics Hygroclip (Rot_NC) Vaisala Humicap HMP155 (V15_NC) Hobo with hygroscopic tape (H08) Hobo with hygroscopic tape (H09) Not covered instruments Vaisala Humicap HMP44 (V44_AN) Vaisala Humicap HMP44 (V44_RN)* Rotronics Hygroclip (Rot_AN) Honeywell HIH (Hwl_AN) Vaisala Humicap HMP44 (V44_NN) Honeywell HIH (Hwl_NN) Hobo without tape (H10) Hobo without tape (H11) * V44_RN and V55_AC in variable rate aspirated screen 1-6m/s

© Crown copyright Met Office Why, what, where and when? As a follow on from COLPEX, at the Springhill Site A ridge top between valleys in Shropshire, near the Welsh border. 402m a.s.l. 585 days from 17th September 2010 to 24th April 2012.

© Crown copyright Met Office Weather conditions

© Crown copyright Met Office Weather conditions

© Crown copyright Met Office Weather conditions

© Crown copyright Met Office RH PDF

© Crown copyright Met Office Timeseries of key readings 1.2m Temperature (C) RH (%) Rain (mm) Minimum Visibility (km) mean, min, max Oct 2010April 2012June 2011

© Crown copyright Met Office Early Low RH data

© Crown copyright Met Office Early Low RH data

© Crown copyright Met Office Saturation issues

© Crown copyright Met Office Late case

© Crown copyright Met Office Late saturated period 1km 5 km 10 km

© Crown copyright Met Office Increasing to saturated

© Crown copyright Met Office Increasing to saturated

© Crown copyright Met Office Drying out

© Crown copyright Met Office Drying out

© Crown copyright Met Office Did they survive?

© Crown copyright Met Office Did they survive?

© Crown copyright Met Office Did they survive? Aspirated Instruments (3m/s)Non-aspirated instruments Covered instruments Vaisala Humicap HMP44 (V44_AC) Vaisala Humicap HMP155 (V15_AC)* Rotronics Hygroclip (Rot_AC) Rotronics Hygroclip (Rot_NC) Vaisala Humicap HMP155 (V15_NC) Hobo with hygroscopic tape (H08) Hobo with hygroscopic tape (H09) Not covered instruments Vaisala Humicap HMP44 (V44_AN) Vaisala Humicap HMP44 (V44_RN)* Rotronics Hygroclip (Rot_AN) Honeywell HIH (Hwl_AN) Vaisala Humicap HMP44 (V44_NN) Honeywell HIH (Hwl_NN) Hobo without tape (H10) Hobo without tape (H11) Chilled Mirror instruments Michell hygrometer with metal cover (MIC_OM) Michell hygrometer with plastic cover (MIC_OP) Meteolabor Thygan hygrometer (THY_OO) * V44_RN and V55_AC in variable rate aspirated screen 1-6m/s

© Crown copyright Met Office Do we trust the data? Aspirated Instruments (3m/s)Non-aspirated instruments Covered instruments Vaisala Humicap HMP44 (V44_AC) Vaisala Humicap HMP155 (V15_AC)* Rotronics Hygroclip (Rot_AC) Rotronics Hygroclip (Rot_NC) Vaisala Humicap HMP155 (V15_NC) Hobo with hygroscopic tape (H08) Hobo with hygroscopic tape (H09) Not covered instruments Vaisala Humicap HMP44 (V44_AN) Vaisala Humicap HMP44 (V44_RN)* Rotronics Hygroclip (Rot_AN) Honeywell HIH (Hwl_AN) Vaisala Humicap HMP44 (V44_NN) Honeywell HIH (Hwl_NN) Hobo without tape (H10) Hobo without tape (H11) Chilled Mirror instruments Michell hygrometer with metal cover (MIC_OM) Michell hygrometer with plastic cover (MIC_OP) Meteolabor Thygan hygrometer (THY_OO) * V44_RN and V55_AC in variable rate aspirated screen 1-6m/s

© Crown copyright Met Office Conclusions The location was a little too wet. Hobos have relatively slow responses. Untaped hobos respond more quickly than taped hobos, but die sooner. Uncovered and covered Vaisala and Rotronics instruments have similar response rates at medium RHs, but uncovered instruments saturate too quickly. Aspirated and not aspirated instruments also have similar response rates at medium RHs. Aspiration shortens the saturated period for Vaisala 44 and Rotronics instruments but not Vaisala 155s.

© Crown copyright Met Office Questions and answers