Towards the CO2Image mission: performance studies using AVIRIS-NG

Monitoring of anthropogenic carbon dioxide (CO2) emission sources with air- and space-borne remote sensing instruments relies on high-spatial resolution measurements. Such observations can be achieved at the expense of decreasing the spectral resolution of the instrument, which in turn complicates CO2 retrieval techniques due to the reduced information content of the spectra.In preparation for the CO2IMAGE mission (&#916;&#955; ~ 1.3 nm) &#8211; a compact satellite proposal currently in phase A at the German Aerospace Center (DLR) &#8211; we present here a dedicated study of CO2 monitoring capabilities with the airborne AVIRIS-NG sensor (&#916;&#955; ~ 5 nm). We conduct CO2 retrievals of several clear-sky AVIRIS-NG point source observations with the RemoTeC algorithm, based on the short-wave infrared absorption bands of CO2. Favorable state vector and spectral retrieval window configurations are identified that reduce correlations between the carbon dioxide and water vapor column concentrations and surface reflection properties. We also discuss the use of a posteriori correction methods to minimize biases in the retrieved CO2 fields and, finally, we carry out source rate estimates for these case studies.

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Satellite-based remote sensing of carbon dioxide over snow-covered surfaces

10.5194/egusphere-egu21-8207 ◽

2021 ◽

Author(s):

Antti Mikkonen ◽

Hannakaisa Lindqvist ◽

Jouni Peltoniemi ◽

Johanna Tamminen

Keyword(s):

Carbon Dioxide ◽

Carbon Cycle ◽

Satellite Observation ◽

Satellite Observations ◽

The Arctic ◽

Late Winter ◽

High Latitudes ◽

Absorption Bands ◽

Surface Reflection ◽

Reflection Model

Global coverage of carbon dioxide (CO2) satellite observations is necessary for accurate seasonal carbon flux estimates. Sufficient seasonal coverage is particularly important for quantifying the carbon cycle at high Northern latitudes which are sensitive to the rapidly changing climate. However, high latitudes pose significant challenges to reliable space-based observations of greenhouse gases. One reason for the shortage of good quality CO2 observations in the high latitudes is the low reflectivity of snow-covered surfaces in the CO2 absorption bands, in addition to large solar zenith angles and frequent cloud coverage over the Arctic and boreal regions. Snow surfaces are highly forward-scattering and therefore the traditional nadir-viewing geometries over land might not be optimal. In addition, the contributions from the 1.6 um and 2.0 um CO2 absorption bands need to be evaluated over snow. In this work, we present a realistic, non-Lambertian surface reflection model of snow based on snow reflectance measurements and examine results of atmospheric radiative transfer simulations in various satellite observation geometries and the contributions from different absorption bands. This research lays important ground work for a dedicated feasibility study of CO2 retrievals over snow, which would ultimately help increase the quantity and reliability of satellite observations at high latitudes from late winter to spring &#8211; an important period for the carbon cycle in the rapidly changing Arctic climate.

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P123 Accuracy and Reliability of the Transcutaneous Carbon Dioxide (TcCO2) Signal in the Sleep Laboratory

SLEEP Advances ◽

10.1093/sleepadvances/zpab014.164 ◽

2021 ◽

Vol 2 (Supplement_1) ◽

pp. A61-A61

Author(s):

A Rossely ◽

A Turton ◽

T Roebuck ◽

S Ho ◽

M Naughton ◽

...

Keyword(s):

Carbon Dioxide ◽

Sleep Laboratory ◽

Blood Gas ◽

Sleep Study ◽

Arterial Blood Gas ◽

Transcutaneous Carbon Dioxide ◽

Arterial Blood ◽

Co2 Monitoring ◽

Sleep Laboratories ◽

Carbon Dioxide Co2

Abstract Carbon Dioxide (CO2) monitoring is an essential part of assessing and treating disorders of hypoventilation in the sleep laboratory. While reliablity issues have been previously reported with the Transcutaneous Carbon Dioxide (TcCO2) signal, there is limited data assessing the validity of this signal or its trend in the sleep laboratory context. Therefore, this study aimed to investigate the change in TcCO2 accuracy from the beginning to the end of the sleep study in real world conditions across two different Victorian public hospital sleep laboratories that used two different TcCO2 monitors. The sample included 13 consecutive patients from Monash Health and 44 consecutive patients from Alfred Health with an average age of 64 and 56 years respectively. Arterial Blood Gas (ABG) measurements were taken prior to and following each sleep study and compared concurrently with the TcCO2 value. Bland-Altman analysis revealed an average difference between TcCO2 and PaCO2 of 3.29mmHg with agreement between -11.44 and 16.64mmHg for the TCM4 device and 1.31mmHg with agreement between -7.64 and 9.05mmHg for the TCM5 device. When accuracy was compared across time points for each patient, 46% of patients had an overnight accuracy change of ≥ 8mmHg when using the TCM4 compared with 20% when using the TCM5. It was concluded that the TcCO2 signal was un-reliable across the different monitors and that the TcCO2 trend may be difficult to interpret with confidence without blood gas calibration at the commencement and conclusion of the sleep study.

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Carbon Dioxide Sensing—Biomedical Applications to Human Subjects

Sensors ◽

10.3390/s22010188 ◽

2021 ◽

Vol 22 (1) ◽

pp. 188

Author(s):

Emmanuel Dervieux ◽

Michaël Théron ◽

Wilfried Uhring

Keyword(s):

Carbon Dioxide ◽

Human Subjects ◽

Measurement Techniques ◽

Blood Gases ◽

Good Alternative ◽

Monitoring Methods ◽

Non Invasive ◽

Arterial Blood ◽

Co2 Monitoring ◽

Carbon Dioxide Co2

Carbon dioxide (CO2) monitoring in human subjects is of crucial importance in medical practice. Transcutaneous monitors based on the Stow-Severinghaus electrode make a good alternative to the painful and risky arterial “blood gases” sampling. Yet, such monitors are not only expensive, but also bulky and continuously drifting, requiring frequent recalibrations by trained medical staff. Aiming at finding alternatives, the full panel of CO2 measurement techniques is thoroughly reviewed. The physicochemical working principle of each sensing technique is given, as well as some typical merit criteria, advantages, and drawbacks. An overview of the main CO2 monitoring methods and sites routinely used in clinical practice is also provided, revealing their constraints and specificities. The reviewed CO2 sensing techniques are then evaluated in view of the latter clinical constraints and transcutaneous sensing coupled to a dye-based fluorescence CO2 sensing seems to offer the best potential for the development of a future non-invasive clinical CO2 monitor.

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A randomized controlled trial of transcutaneous carbon dioxide (CO2) monitoring during ERCP

Gastrointestinal Endoscopy ◽

10.1016/s0016-5107(97)80123-x ◽

1997 ◽

Vol 45 (4) ◽

pp. AB55

Author(s):

DB Nelson ◽

M.L. Freeman ◽

SE Silvis ◽

PN Yakshe ◽

OW Cass ◽

...

Keyword(s):

Carbon Dioxide ◽

Randomized Controlled Trial ◽

Controlled Trial ◽

Transcutaneous Carbon Dioxide ◽

Randomized Controlled ◽

Co2 Monitoring ◽

Carbon Dioxide Co2

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Zigbee Based Wireless A Remote Carbon Dioxide (CO2) Monitoring System

IARJSET ◽

10.17148/iarjset/ncetete.2017.19 ◽

2017 ◽

Vol 4 (2) ◽

pp. 60-62 ◽

Cited By ~ 1

Author(s):

Priti P. Chavan ◽

Surpiya S. Kadam

Keyword(s):

Carbon Dioxide ◽

Monitoring System ◽

Co2 Monitoring ◽

Carbon Dioxide Co2

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End-tidal carbon dioxide (CO2) monitoring in small animals

Brain Research Bulletin ◽

10.1016/0361-9230(89)90116-0 ◽

1989 ◽

Vol 22 (3) ◽

pp. 579-582 ◽

Cited By ~ 2

Author(s):

K.J. Smith ◽

P.A. Felts

Keyword(s):

Carbon Dioxide ◽

Small Animals ◽

Co2 Monitoring ◽

End Tidal Carbon Dioxide ◽

Carbon Dioxide Co2 ◽

End Tidal

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Carbon Dioxide (CO2) Chemosensitivity and SUDEP

Case Medical Research ◽

10.31525/ct1-nct04134754 ◽

2019 ◽

Author(s):

Keyword(s):

Carbon Dioxide ◽

Carbon Dioxide Co2 ◽

Co2 Chemosensitivity

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PERANCANGAN PROTEKSI KEBAKARAN OTOMATIS PADA KAPAL BERBASIS ARDUINO

Jurnal Teknologi Maritim ◽

10.35991/jtm.v1i2.825 ◽

2018 ◽

Vol 1 (2) ◽

pp. 1-8

Author(s):

Dody Hidayat

Keyword(s):

Carbon Dioxide ◽

Fire Extinguisher ◽

Carbon Dioxide Co2

Kebakaran dapat terjadi dimana saja salah satunya dapat terjadi di alat transportasi air yakni kapal. Kebakaran selalu menyebabkan hal-hal yang tidak diinginkan baik kerugian material maupun ancaman keselamatan jiwa manusia. Seiring dari kejadian tersebut musibah kecelakaan kapal yang disebabkan oleh bahaya kebakaran sangatlah mungkin terjadi. Salah satu yang dapat mencegah kejadian kebakaran pada kapal haruslah dapat mendeteksi dini kebakaran tersebut. Untuk mendeteksi dini terjadinya kebakaran dikapal maka dirancanglah sebuah alat proteksi kebakaran otomatisberbasis adruino. Dimana Arduino merupakan board yang memiliki sebuah mikrokontroller sebagai otak kendali sistem. Sistem otomatisasi atau controller tidak akan terlepas dengan apa yang disebut dengan ‘sensor’. Sensor adalah sebuah alat untuk mendeteksi atau mengukut sesuatu yang digunakan untuk mengubah variasi mekanis, magnetis, panas, sinar dan kimia menjadi tegangan dan arus listrik. sistem yang dirancang ini dilengkapi dengan beberapa sensor diantaranya adalah sensor apiUV-Tron R2868, sensor asap MQ-2 dan kemudian sensor suhuDS18B20. Mikrokontroller sebagai pengendali akan merespon input yang berupa sensor tersebut ketika data yang dibaca oleh sensor mendeteksikebakaran diantaranya mendeteksi adanya asap, kemudian api dan suhu. Sebagai output dari sistem berupa racun api (fire extinguisher)dimana kandungan yang ada pada racun api tersebut berupa Dry Chemical Powder dan Carbon Dioxide (CO2) yang fungsinya digunakan untuk memadamkan api serta dilengkapi buzzer sebagai alarm peringatan jika terjadi kebakaran.

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