SCG-NTsarin kula da CO2 gradient na ƙasa

Umfashi na ƙasa shine babban tushen carbon a cikin tsarin halittu na ƙasa, kuma an ba da rahoton cewa matsakaicin numfashi na ƙasa na shekara-shekara a cikin nau'ikan gandun daji 18 na Turai EUROFLUX yana da kashi 49% na jimlar samar da kayan aikinsa na farko (Janssens et al., 2001Binciken Law et al. (2001) ya gano cewa numfashin ƙasa yana da kusan kashi uku cikin huɗu na numfashin dukan tsarin halittu. Kananan canje-canje a cikin tankin carbon na ƙasa zai yi tasiri sosai a kan matakan CO2 na yanayi, saboda haka nazarin yanayin carbon na ƙasa da fitar da CO2 ya zama muhimmin batun gaggawa don hasashen canje-canjen matakan CO2 na yanayi. Bincike mai yawa game da kwararar CO2 a farfajiyar ƙasa (jimlar numfashi na ƙasa), amma a bayyane yake cewa wannan bai isa ba don bayyana tsarin samar da ƙasa na CO2, nazarin CO2 na tsaye na ƙasa yana ƙara zama zafi don nazarin numfashi na ƙasa har ma da zagaye na carbon na tsarin halittu. Kulawa da samar da CO2 a matakan daban-daban na ƙasa (zurfin) yana da mahimmanci don fahimtar yanayin CO2 na ƙasa, wanda zai iya haskaka canje-canje na yanayin CO2 daga ƙasa zuwa yanayi tare da yanayi, haske, zafi, zafi da halayen ƙasa. Bugu da ƙari, za a iya kwatanta sa ido kan CO2 na tsaye na ƙasa da sa ido da ke da alaƙa da turbidity wanda aka yi amfani da shi sosai don bincike mai yawa don nazarin musayar carbon a cikin tsarin halittu. A cikin 'yan shekarun nan, an gudanar da jerin binciken hanyoyin fasaha masu kirkira a kasashen waje, tsarin kula da gradient na CO2 na SCG-3 shine tsarin kula da CO2 na ci gaba bisa ga binciken da aka ambata a sama.

bisaDokar Fick ta farko.A cikin lokacin (a cikin yanayin yaduwa mai daidaituwa) yaduwa kayan kwarara ta hanyar yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankin yankinJYana da daidaitaccen daidaitaccen daidaitaccen daidaitaccen daidaitaccen daidaitaccen daidaitaccen daidaitaccen daidaitaccen daidaitaccen daidaitaccen daidaitaccen daidaitaccen daidaitaccen daidaitaccen ƙasa profile CO2 gudu (μmol CO2 m⁻²s⁻¹(Wato, bisa ga wannan doka, takamaiman lissafin lissafi shine:

J= -D(dC/dx)

daga cikinsuDCO2 a cikin ƙasa (m)²/s， dangane da ƙasa zazzabi, ƙasa girman ruwa abun ciki da kuma ƙasa gap), C ne CO2 matattarar da zurfin x (m),dC/dxDon madaidaiciyar madaidaiciyar, "–" alamar tana nuna yaduwa shugabanci ne a saba da madaidaiciyar madaidaiciyar madaidaiciyar, watau yaduwa daga babban madaidaiciyar yankin zuwa ƙananan madaidaiciyar yankin.

SCGTsarin kula da CO2 gradient yana ƙunshe da na'urorin firikwensin CO2, na'urorin firikwensin O2 (zaɓi), na'urorin firikwensin zafin jiki na ƙasa, na'urorin firikwensin ruwa na ƙasa, ɗakin numfashi na ƙasa (zaɓi), mai tattara bayanai da tashar yanayi ta ƙasa.

Features na tsarin:

l Non-rushewa in situ ci gaba da auna ƙasa profile CO2, ruwa, zafin jiki (misali daidaitawa 3 layers), za a iya samun ƙasa CO2 gudu (ƙasa numfashi) ta hanyar dokar Fick na farko, don haka cimma high lokaci ƙuduri in situ sa ido ƙasa numfashi

l VaisalaWeather firikwensin, atomatik auna rikodin iska zazzabi da zafi, iska matsin lamba, ruwan sama, iska gudun iska, da dai sauransu

l Za a iya yin ma'auni na kasa porosity don ƙayyade CO2 yaduwa coefficient, kasa permeability ma'auni don ƙayyade dangantaka da kasa permeability da kasa danshi da gas gudu

l TRIME-PICO32Kasa ruwa Smart firikwensin, daidai auna kasa ruwa da kuma zafin jiki

l Zaɓi Single tashar ko Multi tashar fluorescent fiber tunani ƙasa profile oxygen in situ sa ido module

l Zaɓi don kula da kayan aiki na kayan aiki na kayan aiki na kayan aiki na kayan aiki na kayan aiki na kayan aiki na kayan aiki na kayan aiki na kayan aiki na kayan aiki na kayan aiki na kayan aiki na kayan aiki na kayan aiki na kayan aiki na kayan aiki

l ACEHanyar numfashi na ƙasa mai haske ko mara haske (zaɓi) don auna numfashi na ƙasa mai haske wanda za a iya amfani dashi don ƙara, daidaitawa ko kwatancen nazarin ƙasa na ƙasa na CO2 gradient

l Wireless bayanai canja wurin, a kowane lokaci online browsing, sauke bayanai

l Optional tare da micro tushe window tushe tsarin m sa ido da tsarin

l Baturi ko hasken rana

Main fasaha nuna alama:

1. Ma'aunin ƙasa mai zafi:

a.TRIME-PICO32Smart firikwensin, TDR ma'auni fasaha, ma'auni kewayon 0-100% girman ruwa abun ciki, daidaito±1%, maimaita daidaito ± 0.2%, ma'auni girman 250ml (zaɓi tare da PICO64, ma'auni girman ne 1250ml, zai iya daidai nuna ruwa abun ciki na ƙasa mai yashi);

b.Ground zafin jiki auna kewayon: -20℃～50℃Ma'auni daidaito: ± 0.2℃

c.Ruwa matsayi IP68

2. Ƙasa CO2 ma'auni: Non-farfajiyar guda guda guda biyu wavelength infrared fasaha (NDIR), ma'auni kewayon 0-5000ppm, 0-7000ppm, 0-10000ppm, 0-20000 zaɓi, daidaito ± 1.5%, amsa lokaci 30m;

3. Daidaitaccen daidaitawa don 3 layers (SCG-3) ƙasa profile CO2, ƙasa ruwa da ƙasa zafin jiki sa ido

4. Single tashar ko Multi tashar ƙasa profile oxygen ma'auni module (zaɓi), fluorescent fiber O2 ma'auni fasaha, high kwanciyar hankali, sifili oxygen amfani, amsa lokaci 5 seconds, ma'auni kewayon 0-50%, daidaito mafi kyau fiye da 0.4%

5. Standard 16 tashoshi data tattara (zaɓi 32 tashoshi don saka idanu kan 3 layers sama da matattarar CO2, ƙasa zafi da ƙasa zafin jiki da dai sauransu):

a.Za a iya adana 220,000 saiti na data tare da lokaci hatimi, 16 bit ƙuduri,± 20 mV up to ± 2.5 V 8Range shigarwa, daidaito 0.03%;

b.Ma'auni tsakanin 3 seconds zuwa 4 hours daidaitawa, da kuma data matsakaicin tsakanin 3 seconds zuwa 4 hours;

c.ƙarfin lantarki 6.5-15VDC, jira wutar lantarki amfani 150μA, auna wutar lantarki amfani 15mA nauyi 140g;

d.Lithium lantarki ajiya baturi, 3V, za a iya amfani da shi fiye da 5;

e.aiki zazzabi -20-60 ° C;

f.Kwararren software na nazarin saukewa na bayanai don yin saukewa na bayanai, lura da bayanai a kan layi, nazarin kididdiga (kamar matsakaicin sa'a, matsakaicin rana, jimlar, mafi ƙarancin darajar, mafi girman darajar, nazarin da ya shafi bayanai) da nunin zane-zane da tsarin saitunan da sauransu;

6. Ƙasa porosity auna: matsin lamba dakin girma ne 1000ml, matsin lamba kewayon -1 ~ 3bar, iska matsin lamba ƙuduri 1mbar

7. In situ surface ƙasa permeability ma'auni: ma'auni kewayon 0.003-3cm / s, ma'auni matsin lamba 1-3hPa, ruwa m ma'auni kewayon 0-800hPa, ƙasa girman ruwa abun ciki 0-70%

8. Kunshin nau'in tsabar kwararar kula da module: SHB dumama fasaha don kula da ruwa kwararar tsabar 5-20mm

9. Gudanar da gudanar da kayan aiki: THB dumama fasaha, dumama ciki na gudanar da kayan aiki, don sa ido kan gudanar da gudanar da kayan aiki sama da 10cm

10. Hanyar numfashi don sa ido kan farfajiyar ƙasa CO₂Flow (optional): daidaitacce daidaitawa don ACE ƙasa numfashi sa ido,Akwai nau'ikan rufewa da buɗewa biyu don zaɓi, kowane nau'in yana da ɗakunan numfashi masu haske ko masu haske don zaɓi,auna kewayondon40.0 mmols m^-3（0-896ppm）,ƙuduri ne 1ppm，Tare da atomatik Zero calibration na'ura

11. Kulawa da yanayi: Mai auna yanayi na Vaisala, Kulawa da yanayin zafi -52℃～60℃, daidaito ± 0.3 ℃; Atmospheric matsin lamba sa ido kewayon 600 ~ 1100hPa, daidaito ± 0.5hPa; Air dangane matsakaici saka idanu kewayon 0 ~ 100%, daidaito ± 3%; Rainfall fitarwa ƙuduri 0.01mm, daidaito 5%

12. Wireless bayanai canja wurin, browsing, sauke bayanai ta hanyar software tashar, da kuma damar statistical analysis na bayanai

13. Tushen tsarin muhalli kulawa (zaɓi): Micro tushen tubu, Micro tushen tubu da kuma bincike software maki, misali Micro tushen tubu diamita 44mm (ciki diamita 42mm), high m, high m, ruwan sama tsayayya, Micro tushen tubu tsawon 17in, 22in, 28in, 37in zaɓi, Micro tushen tubu hoto na'urar, 1/4 "launi CCD, pixels 768 x 494, siginar amo rabo 48DB, zaɓi tare da hannu-hannu high ƙuduri hoto na'urar, 1/3 "launi CCD, ƙuduri har zuwa 1600 x 1200 pixels; Sadarwa ta hanyar USB da kwamfuta, image grabbing, sauki aiki

Hoton da ke sama yana nuna canje-canje a cikin zurfin ƙasa daban-daban (5cm, 12.5cm, 35cm) CO2 gudanarwa R (sama) da matattarar CO2 (ƙasa) a lokacin bazara, ruwan sama ya duba daidaitattun dama (daga Z. Nagy et al., 2011). Binciken ya nuna cewa ma'aunin turbulence ya rage yawan kwararar CO2 (musamman a cikin yanayin ƙananan kwararar), kuma yankunan bushewa na yankunan girgije sau da yawa suna samun kwararar CO2 daga yanayi zuwa ƙasa bayan ruwan sama mai zafi.

Asalin: Turai