scholarly journals PERBANDINGAN PENGUKURAN RADIOMETER DAN RADIOSONDE PADA MUSIM HUJAN DI DRAMAGA BOGOR

2016 ◽  
Vol 17 (2) ◽  
pp. 75
Author(s):  
Ibnu Athoillah ◽  
Saraswati Dewi ◽  
Findy Renggono
Keyword(s):  
Relative Humidity ◽  
Rainy Season ◽  
Lower Layer ◽  
Temperature Data ◽  
Good Match ◽  
Weather Modification ◽  
Comparison Result ◽  
Intensive Observation ◽  
Relative Humidity Data ◽  
Observation Period

IntisariBalai Besar Teknologi Modifikasi Cuaca (BB-TMC) BPPT bekerjasama dengan Badan Meteorologi Klimatologi dan Geofisika (BMKG) melakukan kegiatan Intensive Observation Period (IOP) selama puncak musim hujan pada tanggal 18 Januari - 16 Februari 2016 di wilayah Jabodetabek. Salah satu peralatan yang digunakan untuk observasi adalah Radiometer dan Radiosonde. Pada penelitian ini akan difokuskan bagaimana perbandingan hasil dari pengukuran Radiometer dan Radiosonde selama kegiatan IOP terutama untuk parameter temperatur dan kelembapan relatif. Hasil dari perbandingan pada profil atmosfer di lapisan tertentu terlihat adanya data yang mempunyai kecenderungan jauh dan tidak memiliki kedekatan nilai. Untuk pengukuran temperatur dengan radiometer jika dibandingkan dengan radiosonde, korelasi data semakin kecil di lapisan atas, sebaliknya jika untuk pengukuran kelembapan relatif, korelasi data di lapisan atas lebih tinggi daripada korelasi data di lapisan bawah. Sedangkan jika dibandingkan pada satu waktu antara radiometer dan radiosonde menunjukkan kecocokan untuk kedua data, meskipun kecocokan data kelembapan relatif lebih kecil dibandingkan data temperatur.  AbstractNational Laboratory for Weather Modification (BB-TMC) BPPT has colaborated with Meteorological Climatology and Geophysic Agency (BMKG) in conducting Intensive Observation Period (IOP) during the peak of rainy season in Jabodetabek area on January 18th- February 16th 2016. One of the tools used in the observation is Radiometer and Radiosonde. This study will focus on comparison result between Radiometer and Radiosonde measurement during IOP especially for temperature and relative humidity parameters. The result in a particular layer of profile atmosphere indicates that the data  tends to deviate away. The temperature difference measured using radiometer and radiosonde in the upper layer shows smaller value than that in the lower layer.  In contrast,  the correlation for relative humidity data in the upper layers is higher than in the lower layers. Meanwhile when compared at one time indicate a good match for both data, although the data matches of  the relative humidity are lower than the temperature data.  

scholarly journals The Impacts of Climate Variability on Cholera Cases in Malaysia

2020 ◽  
Vol 19 (1) ◽  
Author(s):  
Hassan NA ◽  
Hashim JH ◽  
Wan Puteh SE ◽  
Wan Mahiyuddin WR ◽  
Faisal MS
Keyword(s):  
Climate Change ◽  
Relative Humidity ◽  
Generalized Linear Models ◽  
Meteorological Parameters ◽  
Linear Models ◽  
Temperature Data ◽  
Weather Patterns ◽  
Temperature And Precipitation ◽  
The Relationship ◽  
Relative Humidity Data

Introduction: Altered weather patterns and changes in precipitation, temperature and humidity resulting from climate change could affect the distribution and incidence of cholera. This study is to quantify climate-induced increase in morbidity rates of cholera. Material and Methods: Monthly cholera cases and monthly temperature, precipitation, and relative humidity data from 2004 to 2014 were obtained from the Malaysian Ministry of Health and Malaysian Meteorological Department, respectively. Poisson generalized linear models were developed to quantify the relationship between meteorological parameters and the number of reported cholera cases. Results: The findings revealed that the total number of cholera cases in Malaysia during the 11 year study period was 3841 cases with 32 deaths. Out of these, 45.1% of the cases were among children below 12 years old and 75% of the cases were from Sabah. Temperature and precipitation gave significant impact on the cholera cases in Sabah, (p<0.001) while precipitation were significant in Terengganu (p<0.001), and Sarawak (p=0.013). Monthly lag temperature data at Lag 0, 1, and 2 months were associated with the cholera cases in Sabah (p<0.001). The change in odds of having cholera cases were by the factor of 3.5 for every 1ºC increase in temperature. However, the contribution of rainfall was very mild, whereby an increase of 1 mm in precipitation will increase the excess risk of cholera by up to 0.8%. Conclusion: This study concludes that climate does influence the number of cholera cases in Malaysia.

EPIDEMIOLOGY, ECOLOGY AND PREVALENCE OF SOIL TRANSMITTED HELMINTHS FROM KOSHI REGION OF NORTH BIHAR.

2018 ◽  
Vol 24 (1) ◽  
Author(s):  
LAKSHMI CHOUDHARY ◽  
PRABHAWATI PRABHAWATI
Keyword(s):  
Relative Humidity ◽  
Ascaris Lumbricoides ◽  
Rainy Season ◽  
Climatic Factors ◽  
Trichuris Trichiura ◽  
Hookworm Infection ◽  
Soil Transmitted Helminths ◽  
High Incidence ◽  
Apparently Healthy

Prevalence of soil transmitted helminthes infections in apparently healthy school going children and other 528 people of different districts of Koshi regions of North Bihar were evaluated. Over all incidences of STHs infection was 39.39% during study. High incidence of STH was seen in the rainy season i.e., in the month of July and August, September, significantly higher (P<0.05) .The incidence of Ascaris lumbricoides was highest in the month of August (18.64%). The month of September was 15.25% followed by that of July (14.4%) and October with 10.16%. Also the incidence of hookworm registered the highest incidence in the month of June (19.27%) and lowest in the month of December (4.82%) during the study period. However prevalence of Trichuris trichiura was negligible and it was almost nil in the most of the months but was highest in month of September with 28.57% and lowest in October with 14.00% The climatic factors are responsible for soil transmitted helminthes which are temperature, rainfall and relative humidity. Ascariasis, Trichuriasis and Ancyclostomiasis (Hookworm infection) are found to be endemic in this region.

scholarly journals Association between meteorological factors and reported cases of hand, foot, and mouth disease from 2000 to 2015 in Japan

2017 ◽  
Vol 145 (14) ◽  
pp. 2896-2911 ◽  
Author(s):  
A. SUMI ◽  
S. TOYODA ◽  
K. KANOU ◽  
T. FUJIMOTO ◽  
K. MISE ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Foot And Mouth Disease ◽  
Entropy Method ◽  
Temperature Data ◽  
Mouth Disease ◽  
Lower Threshold ◽  
Control Measures ◽  
Temperature Threshold ◽  
Average Temperature ◽  
Foot And Mouth

SUMMARYThe purpose of this study was to clarify the association between hand, foot, and mouth disease (HFMD) epidemics and meteorological conditions. We used HFMD surveillance data of all 47 prefectures in Japan from January 2000 to December 2015. Spectral analysis was performed using the maximum entropy method (MEM) for temperature-, relative humidity-, and total rainfall-dependent incidence data. Using MEM-estimated periods, long-term oscillatory trends were calculated using the least squares fitting (LSF) method. The temperature and relative humidity thresholds of HFMD data were estimated from the LSF curves. The average temperature data indicated a lower threshold at 12 °C and a higher threshold at 30 °C for risk of HFMD infection. Maximum and minimum temperature data indicated a lower threshold at 6 °C and a higher threshold at 35 °C, suggesting a need for HFMD control measures at temperatures between 6 and 35 °C. Based on our findings, we recommend the use of maximum and minimum temperatures rather than the average temperature, to estimate the temperature threshold of HFMD infections. The results obtained might aid in the prediction of epidemics and preparation for the effect of climatic changes on HFMD epidemiology.

Numerical Studies of Cyclogenesis Events during the Second Intensive Observation Period (IOP-2) of GALE

1990 ◽  
Vol 118 (2) ◽  
pp. 218-233 ◽  
Author(s):  
Chi-Sann Liou ◽  
Carlyle H. Wash ◽  
Stacey M. Heikkinen ◽  
Russell L. Elsberry
Keyword(s):  
Numerical Studies ◽  
Intensive Observation ◽  
Observation Period

scholarly journals Precipitation at Dumont d'Urville, Adélie Land, East Antarctica: the APRES3 field campaigns dataset

2018 ◽  
Vol 10 (3) ◽  
pp. 1605-1612 ◽  
Author(s):  
Christophe Genthon ◽  
Alexis Berne ◽  
Jacopo Grazioli ◽  
Claudio Durán Alarcón ◽  
Christophe Praz ◽  
...  
Keyword(s):  
Climate Models ◽  
Data Repository ◽  
X Band ◽  
Intensive Observation ◽  
Radar Measurements ◽  
Scientific Results ◽  
Antarctic Precipitation ◽  
Severe Shortage ◽  
Observation Period

Abstract. Compared to the other continents and lands, Antarctica suffers from a severe shortage of in situ observations of precipitation. APRES3 (Antarctic Precipitation, Remote Sensing from Surface and Space) is a program dedicated to improving the observation of Antarctic precipitation, both from the surface and from space, to assess climatologies and evaluate and ameliorate meteorological and climate models. A field measurement campaign was deployed at Dumont d'Urville station at the coast of Adélie Land in Antarctica, with an intensive observation period from November 2015 to February 2016 using X-band and K-band radars, a snow gauge, snowflake cameras and a disdrometer, followed by continuous radar monitoring through 2016 and beyond. Among other results, the observations show that a significant fraction of precipitation sublimates in a dry surface katabatic layer before it reaches and accumulates at the surface, a result derived from profiling radar measurements. While the bulk of the data analyses and scientific results are published in specialized journals, this paper provides a compact description of the dataset now archived in the PANGAEA data repository (https://www.pangaea.de, https://doi.org/10.1594/PANGAEA.883562) and made open to the scientific community to further its exploitation for Antarctic meteorology and climate research purposes.

scholarly journals The Unconventional Eyewall Replacement Cycle of Hurricane Ophelia (2005)

2021 ◽  
Author(s):  
Muhammad Naufal Razin ◽  
Michael M. Bell
Keyword(s):  
Intensity Change ◽  
Wind Maximum ◽  
Low Level ◽  
Tangential Wind ◽  
Eyewall Replacement Cycle ◽  
Flight Level ◽  
Intensive Observation ◽  
Observation Period ◽  
Replacement Cycle

AbstractHurricane Ophelia (2005) underwent an unconventional eyewall replacement cycle (ERC) as it was a Category 1 storm located over cold sea surface temperatures near 23°C. The ERC was analyzed using airborne radar, flight-level, and dropsonde data collected during the Hurricane Rainband and Intensity Change Experiment (RAINEX) intensive observation period on 11 September 2005. Results showed that the spin-up of the secondary tangential wind maximum during the ERC can be attributed to the efficient convergence of absolute angular momentum by the mid-level inflow of Ophelia’s dominantly stratiform rainbands. This secondary tangential wind maximum strongly contributed to the azimuthal mean tangential wind field, which is conducive for increased low-level supergradient winds and corresponding outflow. The low-level supergradient forcing enhanced convergence to form a secondary eyewall. Ophelia provides a unique example of an ERC occurring in a weaker storm with predominantly stratiform rainbands, suggesting an important role of stratiform precipitation processes in the development of secondary eyewalls.

scholarly journals Human Thermal Comfort Situation in the Goller (Lakes) District of Turkey

2016 ◽  
pp. 137-144
Author(s):  
Yuksel Guclu
Keyword(s):  
Relative Humidity ◽  
Thermal Comfort ◽  
Human Health ◽  
Air Temperature ◽  
Mediterranean Region ◽  
Human Thermal Comfort ◽  
Almost All ◽  
Relative Humidity Data ◽  
Recreation Activities

Abstract In this study, the determination of the human thermal comfort situation in the Goller District (in the Mediterranean Region) of Turkey has been aimed. In the direction of the aim, the air temperature and relative humidity data of total 11 meteorology stations have been examined according to The Thermo-hygrometric Index (THI) and the New Summer Simmer Index (SSI). According to this, it has been determined that the thermal comfort conditions are not appropriate in the period of October-May on average monthly. The months of June and September are the most appropriate to almost all kinds of tourism and recreation activities in the outdoor in terms of thermal comfort. When THI and SSI indices’ values are evaluated together, the periods between 5th – 25th June and 29th August-16th September are the most appropriate periods in the study area on average in terms of the thermal comfort for the tourism and recreation activities in the outdoor. Keywords: Thermal comfort, human health, The Thermo-Hygrometric Index, The Summer Simmer Index, Goller District, Turkey.

The variability of evaporation during the HAPEX-Sahel Intensive Observation Period

1997 ◽  
Vol 188-189 ◽  
pp. 385-399 ◽  
Author(s):  
J.H.C. Gash ◽  
P. Kabat ◽  
B.A. Monteny ◽  
M. Amadou ◽  
P. Bessemoulin ◽  
...  
Keyword(s):  
Intensive Observation ◽  
Observation Period

scholarly journals Retrieval of NO2 Column Amounts from Ground-Based Hyperspectral Imaging Sensor Measurements

2019 ◽  
Vol 11 (24) ◽  
pp. 3005 ◽  
Author(s):  
Hyeon-Ju Park ◽  
Jin-Soo Park ◽  
Sang-Woo Kim ◽  
Heesung Chong ◽  
Hana Lee ◽  
...  
Keyword(s):  
Hyperspectral Imaging ◽  
Zenith Angle ◽  
Vertical Profile ◽  
Azimuth Angle ◽  
Fitting Method ◽  
Intensive Observation ◽  
Imaging Sensor ◽  
Total Column ◽  
Observation Period ◽  
Good Agreement

Total column amounts of NO2 (TCN) were estimated from ground-based hyperspectral imaging sensor (HIS) measurements in a polluted urban area (Seoul, Korea) by applying the radiance ratio fitting method with five wavelength pairs from 400 to 460 nm. We quantified the uncertainty of the retrieved TCN based on several factors. The estimated TCN uncertainty was up to 0.09 Dobson unit (DU), equivalent to 2.687 × 1020 molecules m−2) given a 1° error for the observation geometries, including the solar zenith angle, viewing zenith angle, and relative azimuth angle. About 0.1 DU (6.8%) was estimated for an aerosol optical depth (AOD) uncertainty of 0.01. In addition, the uncertainty due to the NO2 vertical profile was 14% to 22%. Compared with the co-located Pandora spectrophotometer measurements, the HIS captured the temporal variation of the TCN during the intensive observation period. The correlation between the TCN from the HIS and Pandora also showed good agreement, with a slight positive bias (bias: 0.6 DU, root mean square error: 0.7 DU).

scholarly journals Probing the Fog Life Cycles in the Namib Desert

2019 ◽  
Vol 100 (12) ◽  
pp. 2491-2507 ◽  
Author(s):  
Robert Spirig ◽  
Roland Vogt ◽  
Jarl Are Larsen ◽  
Christian Feigenwinter ◽  
Andreas Wicki ◽  
...  
Keyword(s):  
Meteorological Data ◽  
Life Cycles ◽  
Cloud Base ◽  
Spatial And Temporal Patterns ◽  
Liquid Water Path ◽  
Field Campaign ◽  
First Results ◽  
Fog Deposition ◽  
Intensive Observation ◽  
Observation Period

Abstract An intensive observation period was conducted in September 2017 in the central Namib, Namibia, as part of the project Namib Fog Life Cycle Analysis (NaFoLiCA). The purpose of the field campaign was to investigate the spatial and temporal patterns of the coastal fog that occurs regularly during nighttime and morning hours. The fog is often linked to advection of a marine stratus that intercepts with the terrain up to 100 km inland. Meteorological data, including cloud base height, fog deposition, liquid water path, and vertical profiles of wind speed/direction and temperature, were measured continuously during the campaign. Additionally, profiles of temperature and relative humidity were sampled during five selected nights with stratus/fog at both coastal and inland sites using tethered balloon soundings, drone profiling, and radiosondes. This paper presents an overview of the scientific goals of the field campaign; describes the experimental setup, the measurements carried out, and the meteorological conditions during the intensive observation period; and presents first results with a focus on a single fog event.

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