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39 Pages

4.4-Jacquemart

Course: SESSION 4, Fall 2009
School: Harvard
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Bromide Methyl : Spectroscopic line parameters in the 7- and 10-m region D. Jacquemart1, N. Lacome1, F. Kwabia-Tchana1, I. Kleiner2 1 Laboratoire de Dynamique, Interactions et Ractivit; Universit Pierre et Marie CurieParis6, CNRS, UMR 7075, France 2 Laboratoire Inter-Universitaire des Systmes Atmosphriques; Universits Paris 12 et Paris 7 , CNRS, UMR 7583, FRANCE Methyl Bromide (CH3Br) Atmospheric trace gas (...

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Bromide Methyl : Spectroscopic line parameters in the 7- and 10-m region D. Jacquemart1, N. Lacome1, F. Kwabia-Tchana1, I. Kleiner2 1 Laboratoire de Dynamique, Interactions et Ractivit; Universit Pierre et Marie CurieParis6, CNRS, UMR 7075, France 2 Laboratoire Inter-Universitaire des Systmes Atmosphriques; Universits Paris 12 et Paris 7 , CNRS, UMR 7583, FRANCE Methyl Bromide (CH3Br) Atmospheric trace gas ( 10 pptv) of both natural and anthropogenic origins (oceanic emission, biomass burning, leaded gasoline, agricultural pesticide ) Major contributor to stratospheric bromine which participates to ozone destruction Deadly toxic gas for human and animal life when exposed to high concentration Spectroscopic line parameters in literature Previous works concern mainly line positions analysis (see Graner JMS 1981;90:394-438) Two recent works on line positions and intensities in the 7-m spectral region (Kwabia Tchana et al. JMS 2004;228:441-52 ; Kwabia Tchana et al. JMS 2006;235:132-43) Presentedinthesecondpartofthistalk No work on broadening coefficients No spectroscopic data is available in atmospheric database such as HITRAN or GEISA CH3Br in our atmosphere Compare to Cl, Br radicals are 10 time more efficient for the ozone destruction Compare to CH3Cl, the quantity in our atmosphere is 10 time less Not yet detected in atmospheric spectra 3 Complete line lists are necessary to detect CH Br CH3Brinthe10mspectraregion Experimental conditions for spectra recorded around 10 m Rapid scan interferometer Bruker IFS 120 HR (LADIR, Paris) (max = 450 cm; FWHM =1.1 10 cm 3 1) Absorbing sample Natural CH3Br Stated purity 50.54 % of CH379Br 49.46 % of CH381Br 99.50 % Experimental conditions S/N ratio 100 __________________________________________________________________ # CH3Br pressure N2 pressure Temperature Absorption path (mbar) (mbar) (K) (cm) __________________________________________________________________ 1 0.4712 0 298.15 415 2 0.8745 0 297.15 415 3 4.738 0 298.15 415 4 7.200 0 298.15 30 5 2.030 25.30 297.55 415 6 3.376 32.90 296.45 415 ________________________________________________________________ Preliminary work Phase correction for each spectrum (Mertz method) Determination of an average effective iris radius Wavenumber calibration using NH3 transitions and HITRAN2004 wavenumbers as etalon 2,2x10 -6 = (HITRAN2004 - this work ) / HITRAN2004 2,0x10 -6 1,8x10 -6 1,6x10 -6 1,4x10 -6 < > = 1.789(40)106 scattering (1SD) of 0.04103 cm1 at 1000 cm1 1040 1,2x10 -6 880 900 920 940 960 980 1000 -1 1020 Wavenumbers in cm Line parameters measurement for transitions having J and K ranging from 0 to 55 and from 0 to 9 1200 transitions fitted between 880 and 1050 cm1 of both CH379Br and CH381Br Use of a multispectrum fitting procedure (Eur Phys J D 2001;14:55-69.) Position, intensity and broadening coefficients of a same line are constrained to be the same during the simultaneous fit of the six spectra. Use of a Voigt profile. For broadening coefficients we assumed that: CH 79 Br/CH 79 Br = CH 81Br/CH 81Br = CH 79 Br/CH 81Br = CH 81Br/CH 79 Br = self 3 3 3 3 3 3 3 3 CH 79 Br / N = CH 81Br / N = N 2 3 2 3 2 Two models have been used to analyze measured line intensities hcE hc 0 1 8 3 0 t 1 exp A Z B S obs (T0 ) = exp k T k T 40 3hc Z tot (T0 ) B 0 B 0 2 gs Classical Herman Wallis treatment with |v,,J,K> as eigenvectors t A Z B 2 = R obs L( J , K , l ) 2 (Watson JKG. Quadratic Herman-Wallis Factors for Symmetric- and Asymmetric- Top Molecules. J Mol Spectrosc 1992;153:211-24.) 2 AK 2 2 F (m, K ) = 1 + AJ m + K 2 K 2 R calc = R0 F ( m, K ) 2 ( ) Treatment using the eigenvectors as a linear combination of the zero order basis wavefunction (-type interactions) B = i v, l , J , K i i (Tarrago G, Delaveau M. Triad vn(A1), vt(E), vt(E) in C3v Molecules: Energy and Intensity Formulation (Computer Programs). J Mol Spectrosc 1986;119:418-25 ) t v6 = 0, l = 0; J , K Z v6 = 1, l = 1; J , K 1 = 1 ( d 6 d 6 2) (2 K 1) F01 ( J , K ) 2 [ ] t v6 = 0, l = 0; J , K Z v6 = 1, l = 1; J , K 1 = 1 ( d 6 d 6 2 ) (2 K 1) F11 (m, K ) 2 [ ] | R0| 2 = 2.688(6)10 Debye2 3 d62 = 2. 691(8)10 Debye2 3 d6(2)=1.41(4)10-4 AJ= 0 AK= 5.3(2)10 3 <(100 (obs calc) / obs)> = 0.01 3.84 % ;<(100 (obs calc) / obs)> = 0.2 3.7 % weak -type interactions for the v6 level 20 15 10 Method 1 Method 2 (obs-calc)/obs*100 5 0 -5 -10 -15 -20 860 880 900 920 940 960 980 1000 -1 1020 1040 1060 Wavenumbers in cm 5,0x10 2 -3 Dipole transition moment squared in Debye Dipole transition moment squared in Debye 4,5x10 4,0x10 3,5x10 3,0x10 2,5x10 2,0x10 1,5x10 1,0x10 5,0x10 -3 K=0 5,0x10 2 -3 K = -1 K = +1 4,5x10 4,0x10 3,5x10 3,0x10 2,5x10 2,0x10 1,5x10 1,0x10 5,0x10 -3 K=1 -3 -3 -3 -3 J = -1 J = +1 J = 0 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -4 -4 0,0 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 0,0 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 m 5,0x10 2 -3 m 5,0x10 -3 Dipole transition moment squared in Debye 2 Dipole transition moment squared in Debye 4,5x10 4,0x10 3,5x10 3,0x10 2,5x10 2,0x10 1,5x10 1,0x10 5,0x10 -3 -3 K=2 4,5x10 4,0x10 3,5x10 3,0x10 2,5x10 2,0x10 1,5x10 1,0x10 5,0x10 -3 K=3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -4 -4 0,0 -60 -50 -40 -30 -20 -10 0,0 m 0 10 20 30 40 50 60 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 m Dipole transition moment squared in Debye Dipole transition moment squared in Debye 2 5,0x10 4,5x10 4,0x10 3,5x10 3,0x10 2,5x10 2,0x10 1,5x10 1,0x10 5,0x10 -3 5,0x10 4,5x10 4,0x10 3,5x10 3,0x10 2,5x10 2,0x10 1,5x10 1,0x10 5,0x10 -3 -3 K=4 2 -3 K=5 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -4 -4 0,0 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 0,0 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 m m Dipole transition moment squared in Debye Dipole transition moment squared in Debye 2 2 5,0x10 4,5x10 4,0x10 3,5x10 3,0x10 2,5x10 2,0x10 1,5x10 1,0x10 5,0x10 -3 5,0x10 4,5x10 4,0x10 3,5x10 3,0x10 2,5x10 2,0x10 1,5x10 1,0x10 5,0x10 -3 -3 -3 K=6 -3 -3 K=7 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -3 -4 -4 0,0 -60 -50 -40 -30 -20 -10 0,0 m 0 10 20 30 40 50 60 -60 -50 -40 -30 -20 -10 m 0 10 20 30 40 50 60 5,0x10 -3 Dipole transition moment squared in Debye 2 4,5x10 4,0x10 3,5x10 3,0x10 2,5x10 2,0x10 1,5x10 1,0x10 5,0x10 -3 K=8 -3 StrongKdependence -3 -3 -3 -3 -3 -3 -4 5,0x10 -3 Dipole transition moment squared in Debye 0,0 2 4,5x10 4,0x10 3,5x10 3,0x10 2,5x10 2,0x10 1,5x10 1,0x10 5,0x10 -3 -3 K=9 -60 -50 -40 -30 -20 -10 m 0 10 20 30 40 50 60 -3 -3 -3 -3 -3 -3 NosignificantJdependence -4 0,0 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 m Ratio of the two calculations for measured transitions (1200) 1,08 1,06 1,04 1,02 1,00 0,98 0,96 0,94 0,92 860 PP(1) RQ(1) RQ(2) 1,06 1,04 1,02 1,00 0,98 0,96 PQ(2) PQ(1) 880 900 920 940 960 980 0,94 RR(1) 1000 1020 1040 1060 -1 0,92 0 10 20 30 40 50 60 Wavenumbers in cm Jinf Ratio of the two calculations for extrapolated transitions (18000 transitions) No line intensity cutoff, but Jmax=60 and Kmax=30 1,10 1,08 1,06 1,04 1,02 1,00 0,98 0,96 0,94 0,92 0,90 700 PP(1) RQ(1) RQ(2) 1,08 1,06 1,04 1,02 1,00 0,98 PQ(2) PQ(1) 800 900 1000 -1 0,96 0,94 0,92 1100 1200 0 10 20 30 40 50 60 RR(1) Wavenumbers in cm Jinf Comparison with measurements PQ(1)branch RQ(1)branch 10 8 6 4 8 6 4 obs-calc in % 2 0 -2 -4 -6 -8 -10 -12 15 20 25 30 35 40 45 50 55 obs-calc in % 2 0 -2 -4 -6 -8 25 30 35 40 45 50 55 Jinf Jinf Analysis of the measured self and N2 widths For C3v molecules the J-and K-dependences of the widths have already been observed for: NH3 V, (Nemtchinov Sung, K, Varanasi P. bands of 14NH3. JQSRT 2004;83:243-65.) Measurements of line intensities and half-widths in the 10-m CH3D (PredoiCrossA,HambrookK,BrawleyTremblayS,BouanichJP,MalathyDeviV,SmithMAH. MeasurementsandtheoreticalcalculationsofN2broadeningandN2shiftingcoefficientsinthe2bandofCH3D. JMolSpectrosc2006;235;3553.) Empirical model has been used to compute measured self and N2 widths Empirical model used to compute measured self and N2 widths For transitions having same value of Jinf 0,60 0,55 -1 0,50 Broadening coefficients in cm .atm 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 0 2 4 Broadening coefficients in cm .atm -1 J=7 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 J = 10 -1 2 J (K ) = a + aJ K 2 0 J K 6 8 10 -1 0 2 4 6 8 10 K 0,60 0,55 -1 J = 20 Broadening coefficients in cm .atm -1 -1 0,60 0,55 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 J = 35 Broadening coefficients in cm .atm 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 0 2 4 6 8 10 -1 0 2 4 6 8 10 K K Empirical model used to compute measured self widths Fit of the two coefficients aJ0 and aJ2 0 2 J (K ) = aJ + aJ K 2 0,55 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,010 0,005 0,000 -0,005 -0,010 0,15 0,10 0,05 0,00 0 10 20 30 40 50 60 -0,015 -0,020 0 20 J J 40 60 Empirical model used to compute measured N2 widths Fit of the two coefficients aJ0 and aJ2 0 2 J (K ) = aJ + aJ K 2 0,15 0,14 0,13 0,001 0,000 0,12 0,11 0,10 0,09 0,08 -0,002 -0,001 0,07 0,06 0,05 0 10 20 30 40 50 60 -0,003 0 10 20 30 40 50 60 J J Comparison between measured and calculated self-widths 0,60 0,60 Self-broadening coefficients in.atm cm Self-broadening coefficients in.atm cm 0,55 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 0,00 0 10 20 30 40 K=0 -1 0,55 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 0,00 0 10 20 30 40 -1 -1 -1 K=1 J 50 60 50 60 J 0,60 0,55 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 0,00 0 10 20 30 40 K=2 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 K=3 50 60 0,00 0 10 20 30 40 50 60 0,60 Self-broadening coefficients in.atm cm -1 0,55 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 0,00 0 10 20 30 40 K=4 -1 50 60 J 0,60 Self-broadening coefficients in.atm cm -1 0,55 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 0,00 0 10 20 30 40 K=5 -1 50 60 J 0,60 0,60 Self-broadening coefficients in cm .atm 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 0,00 0 10 20 30 40 50 K=6 -1 -1 0,55 Self-broadening coefficients.atm in cm 0,55 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 0,00 0 10 20 30 40 K=7 60 -1 -1 50 60 J J 0,60 0,60 Self-broadening coefficients.atm in cm 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 0,00 0 10 20 30 40 50 60 Self-broadening coefficients in cm .atm -1 -1 0,55 K=8 0,55 0,50 0,45 0,40 0,35 0,30 0,25 0,20 0,15 0,10 0,05 0,00 0 10 20 30 40 K=9 -1 -1 50 60 J J Comparison between measured and calculated N2-widths 0,16 N -broadening coefficients in cm .atm 2 K=0 N -broadening coefficients in cm .atm 2 -1 -1 0,16 0,14 0,12 0,10 0,08 0,06 0,04 0,02 0,00 0 10 20 30 40 50 60 0,14 0,12 0,10 0,08 0,06 0,04 0,02 0,00 0 10 20 30 40 50 60 K=1 -1 -1 J J 0,16 N2-broadening coefficients in .atm cm -1 K=2 -1 0,16 N2-broadening coefficients in.atm cm 0,14 0,12 0,10 0,08 0,06 0,04 0,02 0,00 0 10 20 30 40 50 60 0,14 0,12 0,10 0,08 0,06 0,04 0,02 0,00 0 10 20 30 40 K=3 -1 -1 50 60 J J 0,16 N2-broadening coefficients in cm .atm 0,14 0,12 0,10 0,08 0,06 0,04 0,02 0,00 0 10 20 30 40 K=4 -1 -1 50 60 0,16 0,14 0,12 0,10 0,08 0,06 0,04 0,02 0,00 0 10 20 30 40 50 60 -1 J N2-broadening coefficients in cm .atm K=5 -1 J 0,16 0,16 N2-broadening coefficients in cm .atm N2-broadening coefficients in cm .atm 0,14 0,12 0,10 0,08 0,06 0,04 0,02 0,00 0 10 20 30 40 K=6 0,14 0,12 0,10 0,08 0,06 0,04 0,02 0,00 K=7 -1 -1 -1 -1 50 60 0 10 20 30 40 50 60 J J 0,16 0,16 N -broadening coefficients in cm .atm 2 -1 K=8 N -broadening coefficients in cm .atm 2 0,14 0,12 0,10 0,08 0,06 0,04 0,02 0,00 0 10 20 30 40 50 60 0,14 0,12 0,10 0,08 0,06 0,04 0,02 0,00 0 10 20 30 40 50 60 K=9 -1 J -1 -1 J Conclusion for the 10 m region based on the fit of 1200 measurements For positions: -3 -1 The average discrepancy obs-calc is equal to (0.001 0.114)10 cm , -3 -1 The accuracy is estimated to be better than 0.210 cm . For intensities: The average discrepancy obs-calc is equal to 0.2 3.8 %, The rotational dependence is reproduced with accuracy around 5 %. For widths: The average discrepancy %self is equal to 0.8 6.4 %, The average discrepan...

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Folkert BoersmaReducing errors in using tropospheric NO2 columns observed from spaceMain use of satellite observations: estimatingxEMEPWhat is so uncertain about emissions? emissions of NO quantities locations times trends But we can see
Harvard - SWU - 2006
Global Change and Air PollutionShiliang Wu1, Daniel J. Jacob1, Loretta J. Mickley1, David Rind2, David Streets3Background1Harvard University2NASA/GISS3Argonne National LaboratoryQuestion: How will global change affect our goals for clean a
Harvard - RAY - 2008
Ray Nassar, Jennifer Logan, Lee Murray, Lin Zhang, Inna Megretskaia Harvard University COSPAR, Montreal, 2008 July 13-19ElNioSouthernOscillation(ENSO)OceanicAtmosphericphenomenon warmphaseElNio coldphaseLaNiaNio3.4SSTanomaliesandchangesinocean
Harvard - LJM - 2003
The Human Influence on Climate: How much is known, What's in store for us?Loretta Mickley Harvard UniversityCO2 concentrations, Mauna LoaSome background: What do I do? Develop chemical models of the atmosphere Analyze measurements of chemica
Harvard - CLH - 2003
TRANSPACIFIC SATELLITE AND AIRCRAFT OBSERVATIONS OF ASIAN POLLUTIONColette L. Heald, Daniel J. Jacob, Arlene M. Fiore, Louisa Emmons, John C. Gille, Merritt N. Deeter, Juying Warner, David P. Edwards, Glen W. Sachse, Edward V. Browell, Melody A. Ave
Harvard - MAK - 2008
CONSISTENCY among MOPITT, SCIA, AIRS and TESmeasurements of CO using the GEOS-Chem model as a comparison platformMonika Kopacz, JennyFisher, Daniel Jacob, Jennifer Logan, Lin Zhang, Meghan Purdy Michael Buchwitz, Iryna Khlystova, John Burrows, (SC
Harvard - RJP - 2006
NATURAL AND TRANSBOUNDARY POLLUTION INFLUENCES ON REGIONAL VISIBILITY STATISTICS IN THE UNITED STATESRokjin Parkwith support from EPRI, NASA Dalhousie University, May 19, 2006NATIONAL PARKS AND OTHER NATURAL AREAS IN THE U.S. SUFFER SIGNIFICANT
Harvard - PIP - 2004
Using satellite observations of HCHO column to better understand natural NMVOC emission processesPaul Palmer, Dorian Abbot, May Fu, Daniel Jacob, Bill Munger, Kelly Chance, Alex Guenther, Mike Pilling, Jenny Stanton, Shelley Pressley, Brian La
Harvard - NSF - 2010
IMDS TutorialIntegrated Microarray Database System1IMDS User Interface FunctionsI. II. III. IV. V. VI. VII.Logging in to the database. Entering a new experiment. Searching for experiments. Updating an experiment. Entering new sources. Enterin
Harvard - CE - 0
Cultural Competency on Lesbian, Gay, Bisexual or Transgender (LGBT)Norm Kalbfleisch MD, Terri Schmidt MDAbstractThere are over 100 million patient encounters each year in emergency departments across the country. As emergency care providers, we
Harvard - C - 104310
Hospitalists as Teachers: The Issues, the Challenges, and the OpportunitiesDan Hunt, M.D. Director, Inpatient Clinician Educator Service Department of Medicine Massachusetts General Hospital dphunt@partners.org An annotated bibliographyWachter RM,
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MS Outlook 2007 Secure IMAP Configuration Settings for Windows-based PC for HMS Local and Remote Usage OverviewHarvard Medical School (HMS) recently made some adjustments to allow students the ability of accessing their HMS student email remotely wi
Harvard - FB - 95014
PE R S PE C TI V Eimproving health care for the lesbian and gay communitiesImproving Health Care for the Lesbian and Gay CommunitiesHarvey J. Makadon, M.D. n my 40th birthday, I made two important decisions regarding my health: I would finally s
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Harvard Medical School Information Technology Computer TrainingSpring - Summer 2007HMS Information Technology Computer Training Table of ContentsINFORMATION TECHNOLOGY TRAINING OVERVIEW..3 CLIENT SERVICES GROUP (CSG) .3 RESEARCH IMAGING SOLUTIONS
Harvard - E - 6754
[HMS SUGGESTED MODEL] INDUSTRY-ACADEMIC CONSULTING AGREEMENTThis Agreement is made this _ day of _, 200_, by and between (the &quot;Company&quot;), a corporation organized and existing under the laws of the , and (the &quot;Consultant&quot;), an employee and faculty m
Harvard - ED - 21
INDUSTRY-ACADEMIC CONSULTING AGREEMENTThis Agreement is made this _ day of _, 200_, by and between (the &quot;Company&quot;), a corporation organized and existing under the laws of the , and (the &quot;Consultant&quot;), an employee and faculty member of Harvard Medic
Harvard - A - 6963478
ESTABLISHING AN EFFECTIVE COMPLIANCE PROGRAM, COMPLIANCE RISK ASSESSMENTS, AND THE ROLE OF GENERAL COUNSEL June 25-28, 2006 PETER HARRINGTON Harvard Medical School Boston, Massachusetts and TOM SCHUMACHER University of Minnesota Minneapolis, Minnesot
Harvard - BD - 88
From Guidelines for Investigators in Clinical ResearchINTRODUCTION. These guidelines outline principles that should be followed at Harvard Medical School when conducting research The implementation of these guidelines rests within each of the affi
Harvard - A - 103860
LIST OF ACCEPTED DONATIONSbinders books calculators CD-ROMs CDs coat hangers colored paper (blank!) desk organizers discs drawer organizers/ dividers excess paper clips file stackers folders (of all descriptions) hanging folders hole p
Harvard - EAF - 914
Addendum to Consulting Agreement Between (Company) and (Consultant) Company acknowledges that Consultants primary employment responsibility is to Harvard Medical School and Harvard University (together, &quot;HMS&quot;) and that Consultants obligations under H
Harvard - BB - 247972
List of Accepted Donationsfor Freecycling Day 4/22/08 binders books calculators CD-ROMs CDs coat hangers colored paper (blank!) desk organizers discs draw organizers/dividers excess paper clips file stackers folders (of all d
Harvard - P - 030
,OBSERVER-1,OBSERVER-2,DATE,STAND,STATION,TREE#,SPECIES,15sec,20sec,25sec,30sec,CLASS,15sec,20sec,25sec,30sec,CLASS,ACORNS ON GROUND25-Aug-99,PH,1/2,12,RO,7,8,9,11,2,8,11,15,21,2,SOME (MANY UNDEVELOPED)25-Aug-99,PH,1/3,1/3,RO,8,11,13,17,2,7,9,9,12
Harvard - P - 026
depth,Tsu,Pin,Abi,Pic,Lar,Cupae,Slx,Pop,Car,Jug,Os_Ca,Bet,Fag,Cas,Que,Ulm,Mor,Cel,Lir,Liq,Pla,Ace,Ace_r,Ace_s,Ace_n,Ace_i,Til,Nys,Fra,Cor,Myr,Aln,Rib,Rhu,Aquae,Vit,Crn,Ercae,Sam,Rha,Capae,Poaae,Zea_m,Cypae,Urt,Rum,Ch_Am,Cryae,Ran,Braae,Sax,Rosae,Crn_
Harvard - P - 048
Plot,Subplot,Type,Cover02HG1,1,rock,0HG1,1,tree stem,0HG1,1,woody debris,25HG1,2,rock,0HG1,2,tree stem,5HG1,2,woody debris,0HG1,3,rock,0HG1,3,tree stem,0HG1,3,woody debris,0HG1,4,rock,0HG1,4,tree stem,0HG1,4,woody debris,0HG1,5,rock,0HG