Rosalina G. de Guzman's research while affiliated with The National Drug Information Center and other places

Publications (5)

Article
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To meet the growing demand for climate change information to guide national and local adaptation decision-making in the Philippines, the climate science and services community is producing an increasing volume of future climate data using a range of modelling approaches. However, there is a significant methodological challenge in how to best compar...
Article
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This study investigates the seasonal march patterns of rainfall in the Philippines from 1951 to 2012 and their long-term variability. In order to clarify the dominant patterns in the seasonal march of rainfall, an empirical orthogonal function (EOF) analysis was applied to pentad rainfall data of 30 stations. For the first EOF mode (EOF1), we obtai...
Article
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Typhoon Tip (1979) has officially remained the tropical cyclone associated with the minimum SLP of 870hPa. The maximum winds over 1min were estimated at 165kt. On 7 November 2013, Typhoon Haiyan was the first cyclone to have been estimated at 170kt from satellite imagery. The minimum pressure has been estimated at 895hPa using the wind–pressure rel...
Article
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An analysis of tropical cyclone (TC) data from 1951 to 2013 in the Philippines revealed that an average of 19.4 TCs enter the Philippine Area of Responsibility (PAR) every year and nine TCs cross the country. Time series analysis of the TC datasets shows no significant trends in the annual number of TCs in PAR but a slightly decreasing trend in the...
Article
Full-text available
Observed daily precipitation and near surface air temperature data from 34 synoptic weather stations in the Philippines for the period 1951-2010 were subjected to trend analysis which revealed an overall warming tendency compared to the normal mean values for the period 1961-1990. This warming trend can be observed in the annual mean temperatures,...

Citations

... Some of these GCMs showed reasonable skills in simulating climate over SEA from Siew et al. (2014). While these downscaled models have projections until the late 21st century, this paper focuses only on seven GCM-driven RegCM simulations during a 20-year historical period (1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005), and is regarded as a model "ensemble of opportunity" (Daron et al., 2018;Trinh-Tuan et al., 2019;Tangang et al., 2020). We determine whether the downscaled models capture the regional climate well with respect to SST representation. ...
... Therefore an assessment of spatial and temporal characteristic of rainfall in this region is crucial. Considering the importance and consequences of climate change effects over rainfall, some researchers have examined the spatial-and temporal characteristics of rainfall in selected Southeast Asian river basins (Yasunari 1981;Manton et al. 2001;Hamada et al. 2002;Aldrian and DwiSusanto 2003;Jayasekera and Kaluarachchi 2015;Thoeun 2015;Gobin et al. 2016;Limsakul and Singhruck 2016;Piman et al. 2016;Mandapaka et al. 2017;Rajagopalan and Zagona 2016;Chamroeun and Choup 2017;Yendra et al. 2017;Akasaka et al. 2018;Vu et al. 2018;Li et al. 2018;Kang et al. 2019;Olaguera et al. 2018). However, in the north and northeastern region of Borneo, few attempts have been made to assess the rainfall characteristics (Sa'adi et al. 2017). ...
... Here, the maximum rainstorm ratio and the cumulative surface rainfall were calculated using IMERG products, whereas the other four indices were obtained directly from the Digital Typhoon website. Minimum central pressure (Knaff and Zehr 2007;Hoarau et al. 2017) is the lowest pressure at the TC center; a strong TC has a low minimum central pressure. Maximum wind speed is the maximum average wind speed near the TC center; a strong TC has a high maximum wind speed ). ...
... Moreover, the eastern seaboard of Luzon Island is an immediate pathway of tropical storms from the Pacific Ocean during the monsoon season. Climate change has exacerbated the effects of Philippine storms, these having become stronger and more frequent in the last two decades (Cinco et al., 2016). This change is a risk factor to the survival of all the species in NSMNP. ...
... vegetation type, size and slope of catchment area, bedrock lithology, baseflow conditions, and floodplain/aquifer storage (Stoelzle et al., 2014;Yang et al., 2017). Further, tropical islands watershed hydrology is difficult to quantify given parsimonious conditions such as variation in forest canopy and storage, watershed area, small and steep catchment sizes (Christian et al., 2019;Litt et al., 2020). The deseasoned and detrended composite time series used in our SEA, highlight the sensitivity of river discharge to watershed hydrological processes that are not present in the rainfall response and might contribute to the lagged response on a regional scale. ...