Location: Prestwick, UK     Date: November 2013     Flying hours: 50     Sondes: 68


PIKNMIX-C -  Mixture of Met Office projects
CIRCCREX -  CIRrus Coupled Cloud-Radiation EXperiment

PIKNMIX is a range of Met Office cloud pyhsics and radiation campaigns including cold air outbreak studies.  CIRCCREX aims to understand the link between evolving ice cloud microphysical properties and the resulting radiative signatures of the cirrus, at the macrophysical scale, as seen from a remote sensing platform. 



  1. To obtain microphysical and dynamical measurements in a variety of cloud regimes including cold air outbreaks, cirrus and mid-level mixed phase clouds.
  2. Flights in combination with the operational weather radar at Stornaway & Aberdeen
  3. Potential intercomparison flight with MOCCA.
  4. Cold air outbreak up towards Iceland (potential overnight if hangar available)
  5. Spiral descent in Cirrus


CIRCCREX - CIRrus Coupled Cloud-Radiation EXperiment


  1. A radiative closure cirrus cloud-radiation experiment in northern and mid latitudes.
  2. Obtain a well calibrated set of high resolution radiance measurements throughout the infra-red and visible spectrum, 0.3-125 microns, from above and below and within an extensive layer of well developed cirrus.
  3. Characterise the atmospheric column above and below the cloud layer in terms of humidity distribution, temperature structure and other key radiatively-active species.
  4. Map the ice crystal particle size distribution, habit types and crystal complexity (including roughness, concavity etc) within the cloud layer, to provide an accurate, well-constrained, consistent description of the microphysical state.
  5. Use derivatives of the macrophysical and microphysical state, including ice water content and temperature, as input into state-of-the-art scattering model codes and cirrus parameterisations, whose output (via a radiative transfer model) will be critically validated against the radiance measurements throughout the sub-mm, infrared and visible spectrum. Sensitivity of the predicted radiance to PSD, habit types, aggregate and ensemble models, crystal complexity will be investigated by reference to the microphysical datasets.
  6. Exploit campaign datasets and constraint of cloud microphysical and radiative uncertainties in case studies to facilitate improvement of cirrus scattering models allowing a self-consistent and physically-based parameterisation of the ice crystal scattering properties.
  7. Through case studies using northern and mid-latitude campaign datasets, test the ice crystal scattering models and the coupled cloud-radiation parameterization by running the high-resolution version of the MO Unified Model (UM) at 1.0km resolution, with a view to incorporating the new parameterisations into the widely used UM.


STICCS - Submillimetre Trial In Cirrus and Clear Skies - This part of the campaign postponed to November 2014


  • Detachment Manager - Mo Smith, FAAM
  • Logistics - Steve Cowan, FAAM
  • Project Pilot - Ian Ramsay-Rae, DFL
  • PI - Clare Lee, Met Office



STICCS, CIRCCREX and PIKNMIX-C Pre-Detachment Briefing Presentations

  1. icon STICCS-CIRCCREX-PIK & MIX Pre-det Brief - Logistics v1 (3.78 MB) / icon STICCS 2013 - Pre-detachment Briefing - Logistics v1 (2.12 MB)
  2. icon STICCS_predetachment_brief (263 kB) / icon STICCS_predetachment_brief (72.13 kB)
  3. icon circcrex_prestwick_161013 (1.95 MB) / icon circcrex_prestwick_161013 (1.1 MB)
  4. icon cold_air_outbreak_piknmixc (1.14 MB) / icon cold_air_outbreak_piknmixc (773.58 kB)
  5. icon PIknmix_Ac_Sortie_Introduction (2.14 MB) / icon PIknmix_Ac_Sortie_Introduction (412.78 kB)


STICCS and PIKNMIX-C Planning Documents




STICCS and PIKNMIX-C Instrument Configuration Information

The following links provide a listing and diagrams of the proposed instrument fit.



Instrument Fit

The list shows the instrument fit for CIRCCREX and PIKNMIX with the test flying instruments shown as well - see the "Comments" column.

Last updated: 09/04/13 SC





(FAAM unless otherwise stated)



Basic Aircraft, Meteorological Instruments and General Equipment
(always fitted unless otherwise stated)
Temperature: non-deiced/deiced, Heimann IR   y  
Water: General Eastern, Buck CR2 Cryogenic Hygrometer, TWC Lyman-Alpha Hygrometer, Johnson Williams Liquid Water, Nevzorov Total/Liquid Water   y  
Broad-Band Radiometers: Clear and Red   y  
Position/Dynamics: GPS, GIN, Radar altimeter   y  
video: Forward, Rearward, Upward, Downward   y  
Communications: SATCOM-C, SATCOM-Swift 64   y  
Weather radar   y  
Turbulence probe   y  
SAW Cambridge n  
WVSS-II Met Office y  
AVAPS/Aerosol LIDAR Rack      
AVAPS Dropsondes   y 15 maximum for campaign (ref FAAM application form), actual number required?
LIDAR Met Office y  
Photometers: JNO2, JO'D Leicester n  
ARIES Met Office y  
DEIMOS Met Office y  
MARSS Met Office y  
IIR Met Office n  
SWS Met Office y  
SHIM Met Office y  
ISMAR Met Office y  
TAFTS Imperial College n  
Core Chemistry/Nitrate Racks
Ozone   y  
FGGA   n  
CO   y  
Fast NOx   n  
PAN Leeds n  
Core Chemistry Rack, Civil Contingency      
Ozone (2B Technologies)
  n test flight only (No longer required)
SO2   n test flight only (No longer required)
BBCEAS Cambridge n  
FAGE Leeds n  
VACC Leeds n  
Peroxide/Formaldehyde UEA n  
CIMS/QC-LAS Manchester n  
LIF L'Aquila n  
LTI/Grimm OPC FAAM/Leeds n  
TDLAS Cambridge n  
York GCMS York n  
Cloud Physics and Aerosol      
Cloud Physics Rack      
2D Cloud   y  
PCASP   y  
CDPBCP   y  
CIP100   y  
Hertfordshire y  
SID3 Hertfordshire y  
Fast FSSP Met Office n  
FSSP/SPP-100 Manchester n  
AIMMS Probe   y
Manchester Cloud/Aerosol Rack      
CAPS Manchester y
2DS Manchester n  
SPEC-CPI Manchester n  
SPEC-3V-CPI Manchester y  
SP2 Manchester n  
UHSAS Manchester y  
FWVS Met Office n
Nephelometer/PSAP/Filters Rack    
Wet Nephelometer Met Office n  
Nephelometer, PSAP, Filters   y
IAGOS-BCP Manchester n  
INC Met Office n  
CVI Met Office n  
TOF-AMS Manchester n
ALABAMA Max Plank Institute n  


Drag Index Values for PIK & MIX



Instrument Drag Index Value Fitted? Drag index for Fit
FFSSP 3 n  
HVPS 20 n  
2D-P 11 n  
PCASP 1 y 1
SID-1 15 n  
SID-2 18 y 18
SID-3 18 y 18
2D-C 5 n  
2D-C + modified tips 7 n  
Spec-CPI 14 n  
Spec-3V-CPI ?? y ??
CIP-25 30 n  
CIP-25 + modified tips 38 y 38
CIP-100 30 n  
CIP-100 + modified tips 38 y 38
2D-S 31 n  
CAPS 57 n  
CAPS + modified tips 65 y  65
CDPBCP 9 y 9
AIMMS-20 8 y 8
ADA-100 3 n  
PERCA Inlet 7 n  
MARSS scanner 29 y 29
(HOx) FAGE Inlet 89 n  
SWS 36 y 36
CAMP SAW Hygrometer 5 n  
CVI Probe 20 n  
CIMS Inlet (ROx) 39 n  
BBCEAS Inlet 5 n  
LIF Inlet 2 n  
CIMS window-blank Inlet 11 n  
WVSS-II (Rosemount Inlet) 5 y 5
ISMAR 3 y 3
FAGE (HOx & CIMS Inlet [ROx}) 140 n  
GC-MS Inlet 3 n  
Core Chem Inlet 18 y 18
QCL Inlet 6 n  
TOTAL Drag Index     285




Maximum Drag Index Value = 245, unless both the HOx FAGE Inlet and the CIMS (ROx) inlet are removed, in which case the Maximum Drag Index Value =257.