944 resultados para East Asian summer monsoon


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How can we understand the gender logic underpinning the welfare states/systems of East Asia? Does the comparative literature, which has largely been concerned with western Welfare states, whether in The Three Worlds of Welfare Capitalism (Esping-Andersen 1990), or in gender-based analysis of the male breadwinner model (Lewis 1992, 2001, 2006), have anything to offer in understanding the gender assumptions underpinning East Asian welfare states? Are the welfare systems of East Asian countries distinctive, with Confucian assumptions hidden beneath the surface commitment to gender equality? We will use the (mainly western) comparative literature, but argue that Confucian influences remain important, with strong assumptions of family, market and voluntary sector responsibility rather than state responsibility, strong expectations of women’s obligations, without compensating rights, a hierarchy of gender and age, and a highly distinctive, vertical family structure, in which women are subject to parents-in-law. In rapidly changing economies, these social characteristics are changing too. But they still put powerful pressures on women to conform to expectations about care, while weakening their rights to security and support. Nowhere do welfare states’ promises bring gender equality in practice. Even in Scandinavian countries women earn less, care more, and have less power than men. We shall compare East Asian countries (Japan, Korea, Taiwan where possible) with some Western ones, to argue that some major comparative data (e.g. OECD) show the extreme situation of women in these countries. Some fine new qualitative studies give us a close insight into the experience of mothers, including lone and married mothers, which help us to understand how far the gender assumptions of welfare states are from Scandinavia’s dual earner model. There are signs of change in society as well as in economy, and room for optimism that women’s involvement in social movements and academic enquiry may be challenging Confucian gender hierarchies.

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Background: The role of common, low to intermediate risk alleles in breast cancer need to be examined due to their relatively high prevalence. Among many cellular pathways, replication has a pivotal role in cell division and frequently targeted during carcinogenesis. Replication is governed by a host of genes involved in a number of different pathways. This study investigates the effects of replication-gene variants in relation to breast cancer and how this relationship is affected by ethnicity, menopausal status and breast tumour subtype. Methods: Data from a case-control study with 997 incident breast cancer cases and 1,050 age frequency matched controls in Vancouver, British Columbia and Kingston, Ontario were used. Unconditional logistic regression was used to calculate odds ratios between 45 replication gene variants and breast cancer risk, assuming an additive genetic model adjusted for age and centre, presented for Europeans and East Asians separately. Polytomous logistic regression was used to assess odds ratios between each SNP and four breast cancer subtypes defined by hormone receptor status among Europeans. All analyses were stratified by menopausal status. The Benjamini–Hochberg false discovery rate (FDR) was used to address multiple comparisons. Results: Among Europeans, the SNPs in FGFR2, TOX3 and 11q13 loci were associated with breast cancer after controlling for multiple comparisons. Test of heterogeneity showed the SNPs rs1045185, rs4973768, rs672888, rs1219648, rs2420946 among Europeans and rs889312 among East Asians conferred differential risk across the tumour subtypes. Conclusions: Specific SNPs in replication genes were associated with breast cancer, and the risk level differed by tumour subtype defined by ER/PR/Her2 status and ethnicity.

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Buoy and satellite data show pronounced subseasonal oscillations of sea surface temperature (SST) in the summertime Bay of Bengal. The SST oscillations are forced mainly by surface heat flux associated with the active break cycle of the south Asian summer monsoon. The input of freshwater (FW) from summer rain and rivers to the bay is large, but not much is known about subseasonal salinity variability. We use 2002-2007 observations from three Argo floats with 5 day repeat cycle to study the subseasonal response of temperature and salinity to surface heat and freshwater flux in the central Bay of Bengal. About 95% of Argo profiles show a shallow halocline, with substantial variability of mixed layer salinity. Estimates of surface heat and freshwater flux are based on daily satellite data sampled along the float trajectory. We find that intraseasonal variability of mixed layer temperature is mainly a response to net surface heat flux minus penetrative radiation during the summer monsoon season. In winter and spring, however, temperature variability appears to be mainly due to lateral advection rather than local heat flux. Variability of mixed layer freshwater content is generally independent of local surface flux (precipitation minus evaporation) in all seasons. There are occasions when intense monsoon rainfall leads to local freshening, but these are rare. Large fluctuations in FW appear to be due to advection, suggesting that freshwater from rivers and rain moves in eddies or filaments.

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The tropical easterly jet (TEJ) is a prominent atmospheric circulation feature observed during the Asian summer monsoon. It is generally assumed that sensible heating over the Tibetan Plateau directly influences the location of the TEJ. However, other studies have suggested the importance of latent heating in determining the jet location. In this paper, the relative importance of latent heating on the maintenance of the TEJ is explored through simulations with a general circulation model. The simulation of the TEJ by the Community Atmosphere Model, version 3.1 is discussed in detail. These simulations showed that the location of the TEJ is well correlated with the location of the precipitation. Significant zonal shifts in the location of the precipitation resulted in similar shifts in the zonal location of the TEJ. These zonal shifts had minimal effect on the large-scale structure of the jet. Further, provided that precipitation patterns were relatively unchanged, orography did not directly impact the location of the TEJ. These changes were robust even with changes in the cumulus parameterization. This suggests the potential important role of latent heating in determining the location and structure of the TEJ. These results were used to explain the significant differences in the zonal location of the TEJ in the years 1988 and 2002. To understand the contribution of the latitudinal location of latent heating on the strength of the TEJ, aqua-planet simulations were carried out. It has been shown that for similar amounts of net latent heating, the jet is stronger when heating is in the higher tropical latitudes. This may partly explain the reason for the jet to be very strong during the JJA monsoon season.

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本文采用基于风切变的季风指数确定了多年季风爆发的时间;使用实测资料计算分析了2008年南海季风爆发前后海气通量的特征;基于COARE3.0算法,用NCEP2中海气要素再分析资料计算了海气热通量场并与NCEP2中原始热通量场进行了比较;利用EOF方法得到季风爆发早晚年份海气热通量场的时空特征;利用SVD方法分析了热通量场及海温场与季风的关系,初步探讨了海气热通量的变化影响季风爆发的过程和机理。结果表明: 1、2008年南海夏季风爆发期间热带气旋对海气要素的影响较大。动量交换系数与热量交换系数是风速的函数,曲线在风速为4m/s时有一个转折的过程。 2、海温的变化超前于季风爆发时间和强度的变化;热通量的变化超前于海温的变化。热通量通过海温这一中间过程对季风产生作用。 3、季风爆发时间和强度的变化受前期2至3个月时黑潮区域热通量变化的影响。此海域的热通量较大的时候,其后的季风爆发偏早、偏强;反之,季风爆发偏晚、偏弱。